Ahmed & Co. makes and sells two types of shoes, Plain and Fancy Data concerning these products are as follows: Unit selling price Variable cost per unit Plain $19.00 10.00 Fancy $31.00 25.00 Sixty percent of the unit sales are Plain, and annual fixed expenses are $58,500 The weighted-average unit contribution margin is: (Round intermediate calculations and final answer to 2 decimal places) Multiple Choice $3.60 o $780 $8.05 $15 BO