Answer:
Decision = Make
Step-by-step explanation:
The incremental cost to buy and the incremental cost to make can be calculated as follows
DATA
Direct material = $4 (100% variable)
Direct labor = $8 (100% variable)
Overhead = $9 ( 70% fixed)
Total cost per unit = $21
Offered price = $18.5 per unit
Total units = 58,000
Solution
Incremental cost of making
Direct material ( 58,000 x $4) = $232,000
Direct labor (58,000 x $8) = $464,000
Overhead ( 58,000 x $9 x 30%) = $156,600
Total cost = $825,600
Incremental cost of buying
Total cost = No. of units x offered price
Total cost = 58,000 x $18.5
Total cost = $1,073,000
Decision: The company should make the product as the total cost to buy is $247,400 higher than the cost to make.