Suppose that for a company manufacturing calculators, the cost, revenue, and profit equations are given by C= 70 000 + 40x, R=300x- 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 orofit A) Costs are v at the rate of $ per week at this production level (Simplify your answer)

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