Answer:
The minimum selling price = $23
Explanation:
The minimum selling price to be acceptable for the special order be the same as the relevant variable cost of producing a unit.
The relevant variable cost = marginal cost of a unit
Marginal cost = Direct material + Direct labour + Variable manufacturing overhead + shipping cost
Marginal cost = 9+ 7 + (50%× 8) + 3= 23
The minimum selling price = $23
Note : The 50% balance of manufacturing overhead which represents unavoidable fixed costs is irrelevant for this decision. These are costs that would be incurred either way whether or not the special order is accepted.