contestada

At a certain level of operations, per unit costs and selling price are as follows:_______
manufacturing costs, $50;
selling and administrative expenses, $10;
selling price, $80.
Given this information, the mark-on percentage to manufacturing cost used to determine selling price must have been:______
A. 40 percent.
B. 60 percent.
C. 33 percent.
D. 25 percent.