When resources are scarce the maximum management should be willing to pay for one additional unit of that scarce resource is called the: Select one: a. Shadow Price b. Marginal Cost c. Opportunity Cost d. Incremental Cost The economic principle relevant in the calculation of the Indifference Point in a "Make vs Buy" decision is" a. Increasing FC's per unit b. Economies of Scale c. Decreasing VC's per unit d. Diseconomies of Scale