A company manufactures x calculators weekly that can be sold for 75 - 0.01x dollars each. The cost of manufacturing x calculators is given by 1850 +...

A company manufactures x calculators weekly that can be sold for 75 - 0.01x dollars each. The cost of manufacturing x calculators is given by 1850 + 28x - x^2 + 0.001x^3. The number of calculators the company should manufacture weekly in order to maximize its weekly profit is..?