Quantity of fish
Q		 Variable cost
VC		 Total cost
TC		 Marginal cost
MC = ΔTC/ΔQ		 Average variable
cost
AVC = VC/Q		 Average total
cost
ATC = TQ/Q
30 $280 $680 $9.33 $22.67
$4.00
40 320 720 8.00 18.00
12.00
50 440 840 8.80 16.80
16.00
60 600 1,000 10.00 16.67
24.00
70 840 1,240 12.00 17.71
32.00
80 1,160 1,560 14.50 19.50
40.00
90 1,560 1,960 17.33 21.78
48.00
100 2,040 2,440 20.40 24.40