business calculus

Revenue, Cost, and Profit Yaster Electronics manufactures and sells a televisions per month. The cost and revenue in dollars are given by C(x) = 74,506 + 64 x and R(x) - 199 x - 0.035 x2. Use differential approximations to estimate the change in profit if production level is increased from 1,500 to 1,574. Round to the nearest dollar. NOTE: Your answer might be negative