The table shows Chi's cost of producing and selling baskets of apples in a perfectly competitive market at the local farmers' market. Output Total variable cost Total cost Average variable cost Average total cost Marginal cost 0 $0 $10 - - - 1 5 15 $5.00 $15.00 $5 2 8 18 4.00 9.00 3 3 10 20 3.33 6.67 2 4 11 21 2.75 5.25 1 5 13 23 2.60 4.60 2 6 16 26 2.67 4.33 3 7 20 30 2.86 4.29 4 8 25 35 3.13 4.38 5 9 32 42 3.56 4.67 7 10 41 51 4.10 5.10 9 If the apples sell for $5 per basket, Chi's profit per basket is, using numerals, $_____