Answer:
Implicit cost
Explanation:
The rental income Jacques could receive if he chose to rent out his showroom instead of using the showroom for the operation of his guitar business will be classified as an Implicit cost .
An implicit cost in business is a cost that results from the lost opportunity of not using a company's/business own resources excluding cash resources. they are also seen as economic gain/profits sacrificed for not using the company's resources.
Jacques could use the showroom but when he decides to rent it out it becomes an implicit cost even though the rent generates revenue for him.