Exercise $12-18($Algo$)$ Special promotion$-$effects of a $1-$cent sale LO $12-8,12-9$

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 $$13\mathrm{.}99$ and has variable expenses of $$2\mathrm{.}6.$ Expected sales volume without the special promotion is $425$ 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.

a$.$ Contribution margin

b$.$ Total number of pizzas