Profit maximisation has been one of the main aims of the firms. The generally accepted view is the long run will wish to maximize profit. Marginal Cost and Marginal Revenue can be used to find the profit maximising level of output. Marginal cost is the addition to total cost of one extra unit of output. Marginal revenue is the increase in total revenue resulting from an extra unit of sales. Economic theory predicts that profits will be maximised at the output level where marginal cost equals maginal revenue (MC=MR). This is the point where firms will decide to produce.
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