A record club has found that the marginal profit, P'(x), in cents, is given by P'(x) = -0.0007x3+0.34x + 48.9x for x 500, where x is the number of members currently enrolled in the club. Approximate the total profit when 300 members are enrolled by computing the 6 sum P'(x) Ax with Ax=50. i=1 The total profit when 300 members are enrolled is approximately (Round to the nearest cent as needed.) Marginal profit (in cents) 30,000- 24,000- P'(x)=-0.0007x3+0.34x+48.9x 18,000- 12,000- 6,000- IV V VI 0+ 0 100 200 340 400 500 Number of members