Problem 11-4 (Part Level Submission) Mary Willis is the advertising manager for Blue Spruce 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 $51.000 in fixed costs to the $411.000 currently spent. In addition, Mary is proposing that a 5% price decrease (360 to $57) will produce a 20% increase in sales volume (20,000 to 24,000). Variable costs will remain at $36 per pair of shoes. Management is impressed with Mary's Ideas but concerned about the effects that these changes will have on the break-even point and the margin of safety (a) Compute the currehbreak even point in units, and compare it to the break even point in units if Mary's ideas are used. (Round answers to decimal places, .. 1,225.) Current break- even Collapse question part s och New break-even point pairs of shoes