Margaret Willis is the advertising manager for Bargain Shoe Store. She is currently working on a major promotional campaign. Her

ideas include the installation of a new lighting system and increased display space that will add $$21,800$ in fixed costs to the

$$128,000$ currently spent. In addition, Margaret is proposing that a $5\%$ price decrease $($ $$20$ to $$19)$ will produce a $20\%$ increase in

sales volume $(20,000$ to $24,000$