Pri Pri Demand curve Demand for chocolate bars Quantity of Choccos Total quantity of chocolate bars The existence of many competitors means that the firm is a price-taker. )The market marginal cost (MC) curve is approximately the sum of the MC curves of all the producers of the chocolate bars. The firm that makes Choccos chooses to produce at the bottom of the U-shaped isoprofit curve. All chocolate bars will be sold at the same price PMarginal cost of Chaccos Market supply (MC) Isoprofit curve a CO Price Price Demand curve Demand for chocolate bars Quantity of Choccos Total quantity of chocolate bars The existence of many competitors means that the firm is a price-taker