The price-demand equation and cost function for the production of at irons are given as follows: 33 (m) : 150 % and C (a?) = 100, 000 + 20:8 where x is the number of flat irons that can be sold at 35p per flat iron and Clix) is the total cost {in dollars) of producing x fiat irons. 1. Find the prot function. 2. Find the equation for the marginal prot. 3. Find the marginal prot when x = 500 and interpret this quantity