3. Basic CVP Analysis The manager of Dukey's Shoe Station estimates operating costs for the year will include $450,000 in fixed costs. Required a. Find the break-even point in sales dollars with a contribution margin ratio of 40 percent. b. Find the break-even point in sales dollars with a contribution margin ratio of 25 percent. c. Find the sales dollars required to generate a profit of $100,000 for the year assuming a contribution margin ratio of 40 percent