how many units for a and b?

1-30 Bismarck Manufacturing intends to increase capacity through the addition of new equipment. Two vendors have presented proposals. The xed cost for proposal A is $65,000, and for proposal B, $34,000. The variable cost for A is $10, and for B, $14. The revenue generated by each unit is $18. a. What is the break-even point for each proposal? b. If the expected volume is 8,300 units, which alternative should be chosen