What is the burden of establishing substantial evidence to support a finding of error in a calculation of support?

We start with the presumption that the court's orders are correct. (In re Marriage of Arceneaux (1990) 51 Cal.3d 1130, 1133.) "We review factual findings of the family court for substantial evidence, examining the evidence in the light most favorable to the prevailing party. [Citation.] In reviewing evidence on appeal, all conflicts must be resolved in favor of the prevailing party, and all legitimate and reasonable inferences must be indulged in order to uphold the trial court's finding. [Citation.] In that regard, it is well established that the trial court weighs the evidence and determines issues of credibility and these determinations and assessments are binding and conclusive on the appellate court." (In re Marriage of Hill & Dittmer (2011) 202 Cal.App.4th 1046, 1051-1052.) "[T]he burden is on the appellant 'to demonstrate that there is no substantial evidence to support the challenged findings.' [Citations.] A recitation of only [the appellant's] own evidence or a general unsupported denial that any evidence sustains the findings is not the 'demonstration' contemplated under the rule. An appellant 'is required to set forth in his brief all of the material evidence on the point and not merely his own evidence. If this is not done, the error assigned is deemed [forfeited].' " (Green v. Green (1963) 215 Cal.App.2d 31, 35.)

A. Calculation of Support