Answer :
1. The computation of the difference in cost (Incremental Costs) between making and buying the umbrella tote bag is as follows:
Incremental Analysis:
Make Buy Difference
Incremental costs:
Direct materials $3
Direct labor 2
Variable overhead 1
Fixed overhead $0.80
Total avoidable costs $6.80 $54,400 $60,000 $5,600
2. Based strictly on the incremental analysis, Mohave should not buy the tote bags but continue to make them because it incurs more incremental costs buying.
3a. The computation of the difference in cost (Incremental Costs) between making and buying the umbrella tote bag is as follows:
Incremental Analysis:
Make Buy Difference
Incremental costs:
Direct materials $3
Direct labor 2
Variable overhead 1
Fixed overhead $0.80
Total avoidable costs $6.80 $54,400 $50,000 $4,400
3b) The recommendation at No. 2 above changes with the generation of $10,000 in profits from the alternative use of the facility.
Production units = 8,000
Outside supplier's cost per unit = $7.50
Total purchase cost = $60,000
Total purchase cost with alternative profit = $50,000 ($60,000 - $10,000)
Internal production costs:
Direct materials $3
Direct labor 2
Variable manufacturing overhead 1
Fixed manufacturing overhead 2
Total cost per unit $ 8
Unavoidable fixed costs = 60%
Avoidable fixed costs = 40% = $0.80 ($2 x 40%)
Unavoidable fixed cost per unit = $1.20
Total unavoidable fixed cost = $9,600 (8,000 x $1.20)
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