please solve and show all work

21. Johnson Manufacturing intends to equipment. Two vendors have presented their proposals. The fixed cost of proposal A is $50,000 and the fixed cost of proposal B is $70,000. The variable cost per unit of A is $12.00 and of B is $10.00. The revenue generated by each unit is $20.00. increase capacity through the addition of a new (a) What is the break-even quantity for proposal A? (b) What is the break-even quantity for proposal B? (c) What is the break-even revenue for proposal A? (d) If the expected volume is 8500 units, which proposal should be chosen? P- 20