Suppose that for a company manufacturing calculators, the cost and revenue equations (in dollars) are given by R200 - 2000 C-90000 + 404 where the production output in one week is a calculators. If the production rate is increasing at a rate of 600 calculators per week when the production output is so calculators, find each of the following with correct units. Round your answer to two decimal places if necessary. (Note: Profit is revenue minus costs.) The rate of change of the cost with respect to time in 2 The rate of change of the revenue with respect to time is The rate of change of the profit with respect to time is