Special promotion - effects of a 1- cent sale. The management of Rockos 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 $9.99 and has variable expenses of $3. Expected sales volume without the special promotion is 400 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. c. What other factors should management consider in evaluating the pros and cons of the special promotion?