“Rule 24 of the Family Law Rules sets several factors relevant to the preliminary issue of liability for costs. Rule 24(1) establishes a presumption that a successful party to a motion, enforcement, case or appeal is entitled to costs. This presumption may be rebutted having regard for all relevant considerations and the operation of other Rules, as discussed below. Rule 24(1) must be considered in conjunction with Rule 24(6), which provides that where success in a step in a case is divided, the court may exercise its discretion to order and apportion costs as appropriate. The determination of whether success was truly “divided” does not simply involve adding up the number of issues and running a mathematical tally of which party won more of them (Brennan v. Brennan, 2002 CarswellOnt 4152 (S.C.J.)). Rather, it requires a global and contextual analysis that takes into consideration the importance of the issues that were litigated and the amount of time and expense that were devoted to those issues (Jackson v. Mayerle, 2016 ONSC 1556 (S.C.J.), at para. 66; Slongo v. Slongo, 2017 ONCA 687 (C.A.), at para. 3; Vanleer v. Young, 2020 ONCA 459 (C.A.), at para. 46). Where the court concludes that success was in fact divided, it may decline to order costs, or may award costs to the party who was more successful overall or on the primary issues, subject to adjustments that it considers appropriate having regard for the lack of success on secondary issues and any other factors relating to the litigation history of the case (Gomez-Pound v. Pound, [2009] O.J. No. 4161 (O.C.J.); Boland v. Boland, [2012] O.J. No. 1830, 2012 ONCJ 239 (O.C.J.); Beaver v. Hill, 2018 ONCA 840 (C.A.)).