A firm is selling two products-chairs and bar stools-each at $50 per unit. Chairs have a variable cost of $25, and bar stools $20. Fixed cost for the firm is $21,000. a. If the sales mix is 1:1 (one chair sold for every bar stool sold), what is the break-even point in dollars of sales? In units of chairs and bar stools? (Round your unit answers to a whole number before calculating the breakeven point and round the break-even point t the nearest whole number.) Break-even point Number of chairs Number of bar stools b. If the sales mix changes to 1:4 (one chair sold for every four bar stools sold), what is the break-even point in dollars of sales? In units of chairs and bar stools? (Round your unit answers to a whole number before calculating the breakeven point and round the break- even point to the nearest whole number.) Break-even point Number of chairs Number of bar stools