Based on the cost to produce each unit of the switches and the annual demand, the total costs will be $25,900 more than the cost of purchasing the switches.
This can be found as:
= Variable cost + set up costs + supervisor's salary + opportunity cost of lost rent
= ( (6 + 5 + 4) x 5,000 units) + 45,500 + 41,000 + (3,700 x 12 months)
= $205,900
If they bought the switches at $36, they would cost:
= 36 x 5,000
= $180,000
Its cheaper to buy by:
= 205,900 - 180,000
= $25,900
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