Riva Snowboards manufactures fiberglass snowboards. The Z120 fiberglass snowboard has the following manufacturing costs per unit:

Lima, Inc. has offered to make the Z120 snowboard for \(\$ 34\) per snowboard. If Riva buys the snowboard from the outside supplier, the manufacturing facilities that will be idled cannot be used for any other purpose. Should Riva make or buy the Z120 snowboard? 

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Direct materials Direct labor Variable overhead Fixed overhead Manufacturing product cost $18 6 11 3 $38