ill Corporation currently manufactures a subassembly for its main product. The costs per unit are as follows:

Direct materials

$ 1.00

Direct labor

10.00

Variable overhead

5.00

Fixed overhead

8.00

Total

$24.00

Bill Company has contacted Stephans with an offer to sell them 5,000 of the subassemblies for $22.00 each. Stephans will eliminate $25,000 of fixed overhead if it accepts the proposal.

Should Stephans make or buy the subassemblies? What is the difference between the two alternatives?