57. PROFIT oF A CoMPANY The total revenue realized in the sale of x units of the LectroCopy photocopying machine is 0.04 2000x dollars/week, and the total cost incurred in manufacturing x units of the machines is 1000x 120,000 0.02x dollars/week (0 s x 50,000). Find an expression giving the total weekly profit of the company. Hin The profit is revenue minus cost. 58. A CoMPANY A manufacturer of tennis rackets PROFIT oF finds that the total cost of manufacturing x rackets/day is given by 0.000 1x2 4x 400 dollars. Each racket can be sold at a price of p dollars, where p 0.0004 x 10 Find an expression giving the daily profit for the manufac- turer, assuming that all the rackets manufactured can be sold. Hint: The total revenue is given by the total number of rackets sold multiplied by the price of each racket. The profit is given by revenue minus cost.