The revenue R(x), cost C(x) and profit P(x) for a Ay O product are graphed in the figure to the right, where 480- x is the quantity produced and sold. a) Determine the break-even quantity, b) Find the equations of the three functions. c) Determine the fixed cost, the cost to produce each item, the selling price of each item, and the net PX profit per item. -80 20 40 a) The break-even quantity is items sold