Required:

The marketing manager argues that an $$8,000$ increase in the monthly advertising budget

would increase monthly sales by $$15,000.$ Should the advertising budget be increased.

Refer to the original data. Management is considering using higher$-$quality components that

would increase the variable cost by $$3$ per unit. The marketing manager believes the higher$-$

quality product would increase sales by $15\%$ per month. Should the higher$-$quality components be

use.