Sarah 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 $$12,800$ in fixed costs to the

$$137,000$ currently spent. In addition, Sarah is proposing that a $5\%$ price decrease to $$19$ will produce a $20\%$ increase in sales

volume to $24,000$