Answer:
Minimum transfer price = $21
Step-by-step explanation:
Transfer price is the price at which goods are exchange between branches or divisions of the same group
Where a division is operating at the less than the existing capacity, to optimist the group profit, the minimum transfer price should be set as follows
Minimum transfer price = Variable cost
Note that the fixed of $12 per unit (i.e 33-21) is irrelevant for this purpose, whether or not Hinges produces, it will be incurred either way.
It is worthy of note that there is no opportunity cost associated with any transfer to the Doors division because Hinges is currently having excess capacity.
Therefore, any offering price equal to or above the variable cost of $21 would be acceptable and optimize the group profit.
Hence, the minimum transfer price = $21