the answer should be negative

Revenue, Cost, and Profit Yaster Electronics manufactures and sells a televisions per month. The cost and revenue in dollars are given by C(x) = 73,523 + 62 x and R(x) = 205 x - 0.039 x2. Use differential approximations to estimate the change in profit if production level is increased from 1,500 to 1,570. Round to the nearest dollar. $ NOTE: Your answer might be negative. 1,820