Situation 7.3: Leila runs a lawn mowing/maintenance service for busy homeowners. She has six potential customers and each is has a different maximum price they are willing to pay per week. The customers and the maximum price each is willing to pay each week is as follows: Customer Price Lorraine $40 Gilda 15 Jane 30 John 25 Bill 20 Dan 35 Leila's costs depend on the number of customers she has. Her costs (she has no sunk costs) appear in the following table: # of customers per week Total Cost 1 $22 2 $44 3 $66 4 $88 5 $110 6 $132 In Situation 7.3, Leila's optimal number of customers is