Price Quantity Total Marginal 4Q/AP P/Q ($/tree) Own price (trees) Revenue ($) revenue (not ($/tree) (not graded) arc elasticity graded) E(Q,P) 200 0 0 180 120 21,600 180 -6 3.17 -19.00 160 240 38,400 140 -6 0.94 -5.67 140 360 50,400 100 -6 0.50 -3.00 120 480 57,600 60 -6 0.31 -1.86 100 600 60,000 20 -6 0.20 -1.22 80 720 57,600 -20 -6 0.14 -0.82 60 840 50,400 -60 -6 0.09 -0.54 40 960 38,400 -100 -6 0.06 -0.33 20 1080 21,600 -140 -6 0.03 -0.18 0 1200 0 -180 -6 0.01 -0.05