Assume that the following has a linear cost function. Find the cost? f

Assume that the following has a linear cost function. Find the cost? function, C(x), revenue? function, R(x), and profit? function, P(x), where x is the number of items produced? (or sold).Fixed Cost = $300Marginal Cost = $18Item Cost = 30C(x) = 30(x)+300R(x) = 30*100P(x) = Revenue – cost = 300-30?