Assume that the following has a linear cost function. Fixed Cost Marginal Cost per item Item Sells For - $12 $30 Find the following. (a) the cost function (b) the revenue function (c) the profit function (d) the prot on 104 items (a) The cost function is 000 = D. (Simplify your answer. Do not include the $ symbol in your answer.) (b) The revenue function is R(x) = Cl. (Simplify your answer. Do not include the $ symbol in your answer.) (c) The prot function is P(x) = D. (Simplify your answer. Do not include the $ symbol in your answer.) (d) The prot on 104 items is $D. (Simplify your answer.)