Gray Dentistry Services is part of an HMO that operates in a large metropolitan area.

Currently, Gray has its own dental laboratory to produce porcelain and gold crowns.

The unit costs to produce the crowns are as follows:

Overhead is applied on the basis of direct labor hours. The rates above were computed using 5,500 direct labor hours. No significant non-unit-level overhead costs are incurred.
A local dental laboratory has offered to supply Gray all the crowns it needs. Its price is \($100\) for porcelain crowns and \($132\) for gold crowns; however, the offer is conditional on supplying both types of crowns—it will not supply just one type for the price indicated. If the offer is accepted, the equipment used by Gray’s laboratory would be scrapped (it is old and has no market value), and the lab facility would be closed. Gray uses 1,500 porcelain crowns and 1,000 gold crowns per year.
Required:
1. Should Gray continue to make its own crowns, or should they be purchased from the external supplier? What is the dollar effect of purchasing?
2. What qualitative factors should Gray consider in making this decision?
3. Suppose that the lab facility is owned rather than rented and that the \($20,000\) is depreciation rather than rent. What effect does this have on the analysis in Requirement 1?
4. Refer to the original data. Assume that the volume of crowns is 3,000 porcelain and 2,000 gold. Should Gray make or buy the crowns? Explain the outcome.

Transcribed Image Text:

Porcelain Gold Direct materials $ 60 $ 90 Direct labor 20 20 Variable overhead 5 5 Fixed overhead 22 22 Total $107 $137 Fixed overhead is detailed as follows: Salary (supervisor) $30,000 Depreciation 5,000 Rent (lab facility) 20,000