A company determines that its marginal revenue per day is given by R 0 (t) = e .2t 20 with R(0) = 0 where R(t) is the total accumulated revenue, in dollars, on the t-th day when 0 ≤ t ≤ 20. The company’s marginal cost per day is given by C 0 (t) = 50 − t with C(0) = 200 where C(t) is the total accumulated cost, in dollars, on the t-th day when 0 ≤ t ≤ 20. Find P(20).