Answer: $66.90 per unit
Explanation:
Cost that would be avoided is:
= Direct materials + Direct cost + Variable manufacturing overhead + part of fixed manufacturing overhead
= 20.80 + 26.50 + 6.90 + (36.10 - 31.40)
= $58.90
If the outside supplier commits to 59,000 units a year, the company should not pay more than:
= (Number of units supplied * Avoidable cost + contribution margin on other product (opportunity cost) ) / Number of units supplied
= (59,000 * 58.90 + 472,000) / 59,000
= $66.90 per unit