Revenue and Cost for a perfectly competitive firm P Q TR MR TC MC Profit 50 0 20 50 1 50 50 32 50 2 100 50 48 50 3 150 50 68 50 4 200 50 92 50 5 250 50 6 300 50 7 350 50 8 400 50 9 450 50 10 500 50 11 550 50 120 50 152 50 188 50 228 50 270 50 320 50 372 50 12 600 50 428 on 50 13 650 50 488 $162 $0 $180 $108