ABC Company sells two purses : Deluxe and Standard . Deluxe sells for $100 and has a contribution margin of 50 %. Standard sells for $20 and has a contribution margin of 40 %. 25% of the purses sold are Deluxe , and 75 % of the purses sold are Standard . What is the weighted average contribution margin per unit for the company as a whole? a. 29.00 b. 18.50 c. 39.50 d. 17.50