Jeff McMillan owns a small neighborhood shopping mall. Of the 10 store spaces in the building, seven are rented by boutique owners and three are vacant. Jeff has decided that offering more services to stores in the mall would enable him to increase occupancy. He has decided to use one of the vacant spaces to provide, at cost, a gift-wrapping service to shops in the mall. The boutiques are enthusiastic about the new service. Most of them are staffed minimally, which means that every time they have to wrap a gift, phones go unanswered and other customers in line grow impatient. Jeff figured that the gift-wrapping service would incur the following costs: the store space would normally rent for $1,800 per month, part-time gift wrappers could be hired for $1,500 per month, and wrapping paper and ribbon would average $1.20 per gift.