Answer:
Total costs will be $12,000 more than if the switches are purchased.
Explanation:
Total incremental cost:
= Unit cost + Batch level set up cost + Product level supervisory salaries + Rental income
= (material cost + labor cost + overhead) × Annual need for switches + $50,000 + $50,000 + ($4,000 × 12 months)
= (7 + 6 + 5) × 8,000 + $50,000 + $50,000 + ($4,000 × 12 months)
= $144,000 + $50,000 + $50,000 + $48,000
= $292,000
Present cost = Annual need for switches × cost of each switch
= 8,000 × $35
= $280,000
Net increase in costs will be:
= Total incremental cost - Present cost
= $292,000 - $280,000
= $12,000
Therefore, the total costs will be $12,000 more than if the switches are purchased.