The management of Rocko's Pizzeria is considering a special promotion for the last two weeks of May, which is normally a relatively low-demand period. The special promotion would involve selling two medium pizzas for the price of one, plus 1 cent. The medium pizza normally sells for $13.99 and has variable expenses of $2.7. Expected sales volume without the special promotion is 405 medium pizzas per week. Required: a. Calculate the total contribution margin generated by the normal volume of medium pizzas in a week. b. Calculate the total number of medium pizzas that would have to be sold during the 1-cent sale to generate the same amount of contribution margin that results from the normal volume. Note: For all requirements, do not round intermediate calculations. Round your final answer to the nearest whole dollars. Answer is not complete. a. Contribution margin b. Total number of pizzas $ 4,572