Now assume that the returned items processing cost pool is one in which there is idle capacity, and that this cost pool is fixed but could be reduced in the long run by 50% and still allow Ember Company to meet all of its return requirements. How should Ms. Ember allocate the cost of the idle capacity in the returned items processing cost pool when making assessments about which customers are most profitable? Does the answer depend on whether she is thinking in terms of the short run or the long run