Please answer both parts a and b. With correct explanations and calculations. Make sure the you dont use any AI.

A firm is selling two products, chairs and bar stools, each at $55 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 up your unit answers to the next whole number and round "Break-even point" to 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 up your unit answers to the next whole number and round "Break-even point" to the nearest whole number.)

Break-even point	$
Number of chairs
Number of bar stools