HILL, Justice. «
[T1] Father challenges an order modifying his child support obligation and argues that Mother did not show a material change in cireumstances to justify that modification. Father also contends that even if a modification was appropriate, the district court mig-calculated the amount. We will affirm.
ISSUES
[12] Father presents two issues for our review:
1. Modification of Child Support was improper pursuant to the Smith Rule.
2. Even if Modification of Child Support was appropriate, the district court erred in its determination of Fathers child support obligation.
FACTS
[18] Father and Mother married in 1996 and had two children, a girl born in 1997 and 2 boy born in 2000. The parties divorced in 2004 and agreed to share custody. Their agreement provided that they would alternate residential custody on an annual basis, with the custody exchange taking place on July 15 of every year. The parties also agreed that Mother would not pay child support, while Father would pay $500 monthly while the children lived with Mother. The agreement was to expire on July 15, 2008 and per the agreement, the parties were to seek mediation if they could not agree on a custody arrangement moving forward. As it turns out, in 2008 Mother sought to hold Father in contempt for failing to mediate. That was denied in district court, where the court also held that the former custody and child support arrangement should continue, Mother appealed, and this Court affirmed in Zupan v. Zupan, 2010 WY 59, 230 P.3d 829 (Wyo.2010).
[14] In June of 2011, the parties stipulated to a modification of custody. The modification provided that daughter would live with Mother permanently, while son would continue with shared custody. Father would pay $250 per month in child support for daughter, and an additional $250 while both children lived with Mother. This matter began in 2012 when Father filed a Motion for Order to Show Cause, seeking to hold Mother in contempt for failing to pay unreimbursed medical expenses for the children, On May 4, 2012, Mother counterelaimed to modify child support and requested that the modification be retroactive to the date Father was served with the counterclaim. After a hearing, the district court entered its Order Granting in Part and Demying in Part Plaintiffs Motion for Order to Show Cause and Order Modifying Judgment and Decree of Divorcee. The district court determined that Father owed $18,813.81 in retroactive child support from May of 2012 to January of 2015. The court offset that amount by unreimbursed medical expenses Mother owed to Father in the amount of $2,069.16. The court ruled no accrual of interest would occur if Father paid Mother within 60 days of entry of the order. The court further ruled that beginning on June 1, 2015; Father would pay monthly child support in the amount of $466.55 for the parties son. Fathers appeal followed this ruling.
STANDARD OF REVIEW
[T5] Our standard of review in child support cases is well established:
In general, determinations concerning child support are left to the district courts sound discretion. Verheydt v. Verhkeydt, 2013 WY 25, ¶ 19, 295 P.3d 1245, 1250 (Wyo.2013); Witowski v. Roosevelt, 2009 WY 5, ¶ 13, 199 P.3d 1072, 1076 (Wyo.2009). Consequently, we will not disturb the district courts decision unless it abused its discretion. In determining - whether an abuse of discretion occurred, our core inquiry is the reasonableness of the district courts decision. Verheydt, ¶ 9, 295 P.3d at 1250; Hanson v. Belveal, 2012 WY 98, ¶ 14, 280 P.3d 1186, 1192 (Wyo.2012).
Bagley v. Bagley, 2013 WY 126, ¶ 6, 311 P.3d 141, 148 (Wyo.2013).
[16] Judicial discretion is a composite of many things, among which are conclusions drawn from objective criteria; it means a sound judgment exercised with regard to what is right under the cireumstances and without doing so arbitrarily or capriciously. Rodenbough v. Miller, 2006 WY 19, ¶ 8, 127 P.3d 800, 802 (Wyo.2006); Vaughn v. State, 962 P.2d 149, 151 (Wyo.1998) (quoting Martin v. State, 720 P.2d 894, 897 (Wyo.1986)); Watson v. Watson, 2002 WY 180, 60 P.3d 124, 125 (Wyo.2002); Groenstein v. Groenstein, 2005 WY 6, ¶ 10, 104 P.3d 765, 768-69 (Wyo.2005).
DISCUSSION
Child Support Modification
[¶7] Father argues that the modification of child support was improper pursuant to the Smith rale. In Smith v. Smith, 895 P.2d 37 (Wyo.1995) and its progeny, we concluded that when parties agree to a child support amount, even when that amount deviates 20% from the presumptive support amount, the petitioner for modification must show both (1) a 20% change in the amount of support and (2) a material change in cireum-stances. We extensively explained Smith in Wright v. Wright, 5 P.3d 61, 68 (Wyo.2000):
In Smith, Mr. Smith initially entered into an agreement with Mrs, Smith to pay $5,000 per month in child support, even though that was an amount many times greater than the presumptive level of support. Later, the Smiths reached a second agreement® which reduced Mr. Smiths child support obligation to $8,000 per month, an amount which was still many times greater than the presumptive support level. Mr. Smith then sought an adjustment of his child support obligations to bring them into line with the statutory level of presumptive child support. Based on those facts, we held that Wyo. Stat. Ann. § 20-6-802;
invokes the discretion of the trial judge, in the modification hearing, to weigh the enumerated thirteen factors and also the presence or absence of an agreement in the light of the policy favoring finality. In instances in which the parties have arrived at an -agreement as to child support previously, even when the support agreed to deviates by more than twenty percent from the presumptive guidelines, the petitioner must introduce other evidence of a material change in cirenmstances in order to justify a modification. Smith, 895 P.2d at 42,
This Court then attempted to clarify the rule set forth above in Smith to apply only to cases in which the parties entered into a stipulation to child support amounts before the current guidelines were enacted but which deviated from the guidelines in existence at that time, and to stipulated child support amounts under the current guidelines which deviate from the current guidelines by twenty percent or more at the time the judgment was entered. Sharpe v. Sharpe, 902 P.2d 210, 213 (Wyo.1995). Thus, as clarified by Sharps, the rule in Smith became; In instances in which the parties have arrived at an agreement as to child support previously, and when the support agreed to deviates by more than 20% from the presumptive guidelines, the petitioner must introduce other evidence of a material change in cireumstances, in addition to a present 20% deviation, in order to justify a modification.
This rule attempts to eliminate the possible evil of a non-custodial parent agreeing to pay child support which exceeds 20% deviation to secure a custodial parents signature on a stipulation, only to come back to court within six months and ask for modification based upon a 20% deviation, Or, in the alternative, to prevent a custodial parent from agreeing to a child support amount which exceeds a 20% deviation below the guidelines to secure a noncustodial parents signature on a stipulation, only to come back within six months asking for modification based only upon a 20% deviation. This rule does not apply to situations in ~which the child support amount- agreed to by the parties did not exeeed a 20% deviation one way or another from the guidelines in existence at the time the stipulation was executed. Where the agreement reached by the parties with respect to child support is predicated upon the operation of the presumptive child support statute, Smith and Sharpe play no role in the process of review and adjustment of child support as provided for in § 20-6-806(a).>
With regard to modifying child support, Wyo. Stat. § 20-2-811(a) (LexisNexis 2015) provides three methods under which a support modification may be proven: (1) support order in place for six months and a 20% change in the presumptive support amount; (2) at any time, based on a substantial change in cireumstances; and (8) either parent may request review of a child support order [elv-ery three (8) years.
[18] Here, we agree with Fathers suggestion that Mother was required under Smith to prove a material/substantial change in cireumstances. While Mother did not allege that a material change in cireumstances had occurred, nor did the district court make such a finding in its order, we believe that a material change did in fact occur. When Mother filed her petition when the parties custodial arrangement changed, she in ef-feet made the argument that a change had taken place. The custody change she alleged is more than enough to establish a change in cireumstances, even without a specific finding from the district court in that regard. Nonetheless, the district court explicitly found a 20% increase in the presumptive support amount when it calculated Fathers new child support obligation at $466.55 per month. Accordingly, both requirements of Smith are satisfied. Having concluded that the modification was proper, we turn to the actual determination of the child support obligation.
Calculation of Income for Determination of Child Support
[T9] - Presumptive . child - support amount is calculated using the parents net income. Bagley, ¶ 15, 311 P.3d at 145:
Net income means income as defined in paragraph (i) of this subsection less personal income taxes, social security deductions, cost of dependent health care coverage for all dependent children, actual payments being made under preexisting support orders for current support of other children, other court-ordered support obligations currently being paid and mandatory pension deductions. Payments towards child support arrearage shall not be deducted to arrive at net income{.]
Wyo. Stat. Aun. § 20-2-808(a)(iii) (Lexis-Nexis 2018).
[110] Under that same statute, income means:
[Alny form of payment or return in money or in kind to an individual, regardless of source, Income includes, but is not limited to wages, earnings, salary, commission, compensation as an independent contractor, temporary total disability, permanent partial disability and permanent total disability workers compensation payments, unemployment - compensation, - disability, annuity and retirement benefits, and any other payments made by any payor, but shall not include any earnings derived from overtime work unless the court, after considering all overtime earnings derived in the preceding twenty-four (24) month period, determines the overtime earnings can reasonably be expected to continue on a consistent basis. In determining income, all reasonable unreimbursed legitimate business , expenses shall be deducted. Means tested sources of income such as Pell grants, aid under the personal opportunities with employment responsibilities (POWER) program, supplemental nutrition assistance program and supplemental security income (SSI) shall not be considered as income. Gross income also means potential income of parents who are voluntarily unemployed or underemployed[.]
Wyo. Stat. Ann, § 20-2-808(a)(i) (LexisNex-is 2015). - .
[111] Regarding his income, Father complains that the district court should have determined his net income separately for 2012, 2013, and 2014 because those years experienced different highs and lows based on the respective economies from year to year. He also argues that the court improperly imputed income to him from his rental properties, health insurance premiums paid by his company, and life insurance policy payments. Regarding Mothers income, Father argues that the court erred in allowing Mother improper deductions for home office space, utilities, home internet, and her cell phone. Father contends that while those deductions are appropriate for federal tax purposes, only legitimate business expenses may be deducted for purposes of calculating income for child support, and that regardless of her employment, Mother would nevertheless incur those expenses. To conclude, Father submits that his retroactive support should total $1,404.06 and that his monthly support obligation going forward should be $30.66 per month,.
[112] During a bench tnal, much of the evidence presented: concerned the parties income. Ultimately, after the trial and after considering each parties proposed Findings of Fact and Conclusion of Law, the district court found Fathers net monthly income to be $8,403.00 and Mothers to be $3,622.00. Also in its order, the court made findings regarding the parties financial sources, The court noted that Father is a self-employed electrical plumbing contractor and the sole owner of Zupan Electric, Inc. Father controls his rate of pay, benefits, provision of health insurance and the like.
[118] First, regarding Fathers argument about Mothers financials-and specifically, the deductions she takes to arrive at her net income-we cannot say the district courts decision was an abuse of discretion. This Court has reiterated several times that there is no per se prohibition ... on the use of federal tax information as evidence in determining income and net income under the Wyoming child support statutes. Ackerman v. Ott, 2014 WY 93, ¶ 12, 330 P.3d 271, 274 (Wyo.2014) (quoting Ready v. Ready, 2008 WY 121, ¶ 16, 76 P.3d 836 840 (Wyo.2003)).
In fact, in all child support pr oceedmgs, the parties are required to submit to the court financial affidavits with supporting documentation that includes copies of their most recent tax returns. Thus, it is clear from case law that the focus should be upon the reasonable and legitimate nature of the expense and its impact on the partys actual cash flow in the year in question rather than the treatment of the expense by federal law in the context of income taxes.
Ackerman, ¶ 12, 330 P.3d 271, 274. Furthermore, when determining which business deductions to allow for the purposes of determining child support, a court is not bound by the tax laws. 2 Jeff Atkinson, Modern Child Custody Practice, Second Edition, Ch. No. 11, § 11-27 (2014). Although deductions for things such as a home office should be subject to serutiny, they should not be categorically disallowed,. Accordingly, to de facto prohibit all deductions for rent, utilities, and repairs, when the record clearly indicates that such expenses occurred and were necessary, also would be error,
[114] As to Fathers argument about his income being improperly computed, we also cannot find an abuse of discretion by the district court. As Father points out, the district court had ample information and heard sufficient testimony regarding Fathers income. Father also contends that his incomes over several years should have been averaged in order to compute his child support obligation. It is true that we have approved income averaging for the purpose of calculating child support where cireumstances require it. Madison v. Madison, 859 P.2d 1276, 1280 (Wyo.1998); Triggs v. Triggs, 920 P.2d 653, 662 (Wyo.1996); Bollig v. Bollig, 919 P.2d 136, 138 (Wyo.1996); Wood v. Wood, 964 P.2d 1259, 1264 (Wyo.1998). However, this is not to say income averaging is mandated in all cirenmstances showing income fluctuation. Accordingly, the district court did not abuse its discretion in deciding to use only one year of income figures. Our careful review of the record demonstrates that the district court took into account all relevant and available information in reaching its determination of Fathers income level. -
Unreimbursed Medical Expenses .
< [115] Mother argues in her brief that she should have been credited for unreim-bursed medical expenses. However, she cannot seek a change in the district courts ruling on this issue at this time, inasmuch as she did not cross-appeal. As we explain in GOB, LLC v. Rainbow Canyon, Inc., 2008 WY 157, ¶ 10, 197 P.3d 1269, 1271-72 (Wyo.2008):
The (distinction between arguing in brief and cross-appealing generally is that a cross-appeal is required to win a change in the judgment, while arguments to support the judgment can be made without a cross-appeal. Wright, Miller & Cooper, Federal Practice and Procedure: Jurisdiction 2d § 4478.6, at 831 (2002), A survey of cases before this Court involving cross-appeals bears out this distinction. For example, in Garrison v. CC Builders, Inc., the appellees prevailed below, but cross-appealed contending that the damage award was incorrect, 2008 WY 34, ¶ 26, 179 P.3d 867, 875 (Wyo. 2008). In Diamond B Sves., Inc. v. Rohde, the Dé-partment of Employment granted a workers request for unpaid wages but denied an award for interest on the unpaid wages, costs, and attorney fees. 2005 WY 130, ¶¶ 1-2, 120 P.3d 1031, 1035 (Wyo. 2005). The employer appealed the award of unpaid wages, and the worker cross-appealed the denial of interest on the unpaid wages, costs; and attorney fees. Id. Our history includes many similar examples, E.g., Wells Fargo Bank v. Hodder, 2006 WY 128, 144 P.3d 401 (Wyo. 2006) (Trust beneficiaries sued Trustee alleging breach of fiduciary duty. Beneficiaries prevailed and Trustee appealed. Beneficiaries cross-appealed seeking attorney fees and prejudgment interest.); Wallop v. Wallop, 2004 WY 46, 88 P.3d 1022 (Wyo. 2004) (Wife appealed property division in a divorcee. Husband cross-appealed contending that the district court made a mathematical error when it calculated the wifes share of an annuity benefit.); Warnick v. Warnick, 2003 WY 113, 76 P.3d 316 (Wyo. 2008) (Partner sued partnership and remaining partners,. Plaintiff partner prevailed on summary judgment and was awarded value of the partnership. Defendants appealed the summary judgment, and the plaintiff appealed the courts calculation of the partnership share value.). .
Sanctions
[T16] Finally, Mother suggests that it would be appropriate to award her costs and attorney fees under Wyoming Rule of Appellate Procedure 10.05. That rule provides: [ilf the court certifies ... there was no reasonable cause for the appeal, a reasonable amount for attorneys fees and damages to the appellee shall be fixed by the appellate court and taxed as part of the costs in the cage. W.R.A.P. 10.05(b).
{T17] Sanctions under Rule 10.05 are generally not available for challenges to discretionary rulings, unless an appeal lacks cogent argument, there is an absence of pertinent legal authority. to support the issues, or there is a failure to adequately cite to the record. Welch v. Welch, 2003 WY 168, ¶ 13, 81 P.3d 937, 940 (Wyo. 2003) (citations omitted). Although unsuccessful on appeal, Fathers efforts were reasonable, Mothers request for Rule 10.05 sanctions is denied,
«CONCLUSION
[T18] We affirm the district court. Our review of the record shows that the district court was within its discretion in calculating both Fathers and Mothers net income for child support purposes. C