A record club has found that the marginal profit P x in cents is given by P x 0 0006x 0 20x 43 9x for x 300 where x is the number of members currently enrolled in the club Approximate the total profit when 180 members are enrolled 6 by computing the sum P x Ax with Ax 30 i 1 The total profit when 180 members are enrolled is approximately Round to the nearest cent as needed Marginal profit in cents 16 000 P x 0 0006x3 0 20x2 43 9x 12 800 9 600 6 400 3 200 04 0 TIV V VI 100 200 Number of members 300