Stevie's Pizza sells an average of 180 pizzas per week, of which 60% are single-topping pizzas and 40% are supreme pizzas with multiple toppings. Singles sell for $9 each and incur variable costs of $7. Supremes sell for $17 each and incur variable costs of $9. The contribution margin per unit and total contribution margin for Singles and Supremes are Singles Supremes Contribution Total Contribution Total Margin per Unit Contribution Margin Margin per Unit Contribution Margin OA. 2 $ 216 $ 8 $ 576 OB. $ 2 $ 216 $ 8 $ 216 OC. $ 2 $ 972 $ 8 $ 288 OD. S 2 $ 576 $ 8 $ 216