In the presentation of cost-of-service pricing, mention was made of decreasing cost industries. Some transportation firms fall into this category. If prices are based on strict marginal cost, the firm experiences a loss. A subsidy could be paid, but this is not likely to be done. Therefore, the firm has to recover its fixed costs. To accomplish this on the basis of an average-cost approach is not acceptable. However, it can be accomplished by using marginal cost as a floor for prices and using the value of service, or demand, to establish how far above this minimum the rate or price should be set.