For a Columbus Day event, a buyer plans to purchase 250 knit dresses to retail for $75 each. A 47% markup is needed on the total purchases. From one of the buyer's best resources, 110 dresses were purchased that cost $33.75 each. The buyer knows, however, that the costs will have to be averaged on the balance of other purchases from alternate resources in order to achieve a 47% markup on the entire group. What what markup percentage did the buyer attain on the first purchase of 110 dresses? a) 55% b) 19.8% c) 45% d) 24.2%