MyLab X Math 1325 E03 Fall 2021 Question 13 of 23 This test: 100 point(s) possible = Test: Final Exam This question: 4 point(s) possible Suppose that for a company manufacturing calculators, the cost, revenue, and profit equations are given by x 2 C=80,000 +20x, R=200x- 20 P=R-C where the production output in 1 week is x calculators. If production is increasing at a rate of 500 calculators per week when production output is 6,000 calculators. Find the rate of increase (decrease) in cost, reve A) Costs are at the rate of $ per week at this production level (Simplify your answer.) B) Revenue is at the rate of $ per week at this production level. (Simplify your answer.) C) Profits are at the rate of $ per week at this production level. (Simplify your answer )