In Sikes v. Sikes, 98 N.C. App. 610, 391 S.E.2d 855 (1990), aff'd, 330 N.C. 595, 411 S.E.2d 588 (1992), the defendant-appellant contended that the plaintiff-appellee had not met her burden of showing changed circumstances from the prior order, so that the trial court erred in granting her an increase in child support. 98 N.C. App. at 614, 391 S.E.2d at 857. The Court overruled the defendant-appellant's assignment of error, concluding that the prior order had been an interim order clearly and unequivocally. intended to facilitate the transfer of custody to plaintiff pending an agreement between the parties or a determination by the trial court as to an appropriate level of support. The later order . . . was manifestly the first time a determination on the merits of the issue of child support was made, and thus no findings relating to a change in circumstances were required. Id.