Blossom Corporation produces microwave units. The following per-unit cost information is avallable: direct materials $34; direct labour $22; variable manufacturing overhead $16; fixed manut acturing overhead $40; variable selling and administrative expenses $12; and fixed selling and administrative expenses $26, Its desired ROI per unit is $28.08. Calculate the markup percentage using variable-cost pricing. (Round answer to 2 decimol places, eg. 15.25\%)