16 (13 complete) HW Score X 10.6.33-BE Suppose that for a company manufacturing calculators, the cost, revenue, and profit equations are given by C=90,000 +40x, R=300x - x P=R-C 20 where the production output in 1 week is x calculators. If production is increasing at a rate of 600 calculators per week when production output is 4,000 calculators. Find the rate of increase (decrease) in cost, revenue, and profit. A) Costs are at the rate of $|per week at this production level. (Simplify your answer.) Enter your answer in the answer box and then click Check Answer. 2 parts remaining Clear All Check Ans Type here to search O Ri 73'F Weather alert ~ O ( " ( 4)