Suppose that for a company manufacturing​ calculators, the​ cost, revenue, and profit equations are given by C=80,000+30x,  R=300x−x220, 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, revenue, and profit.       Question content area bottom Part 1 ​A) Costs are ▼     at the rate of ​$enter your response here per week at this production level. ​(Simplify your​ answer.) Part 2 ​B) Revenue is ▼   increasing decreasing at the rate of ​$enter your response here per week at this production level. ​(Simplify your​ answer.) Part 3 ​C) Profits are ▼   increasing decreasing at the rate of ​$enter your response here per week at this production level. ​(Simplify your​ answer.)

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