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When deciding whether to drop a product line, the only things that should be considered are the contribution margin provided by the product line and the fixed costs that could be avoided by dropping the product line. This is important because fixed costs are sometimes allocated to product lines, which can distort managerial decision-making by creating the appearance that the firm would be more profitable by dropping a product line that may appear unprofitable because it is being allocated fixed costs that would not disappear if the product line were dropped.