a What is the equation of the profit function P x for this commodity Recall that to find the total profit P x we subtract the total cost C x from the total revenue R x Select the equation for the profit function P x R x C x P x C x R x P x R x C x P x C x R x P x R x x C x Step 2 Now substitute the functions R x 371x and C x 71x 3 300 into P x R x C x Simplify the result by collecting like terms P x R x C x P x 371x 71x 3300