Activity based costing: Question 14 options: corrects the distortions built into product costing by the way that the learning curve is applied to direct labor costs. corrects the distortions built into product costing by the way that direct costs are allocated. eliminates nonvalue-adding activities; reduces activity occurrences, and reduces the cost driver rate. is important to cost accountants, but has little practical use for buyers. eliminates nonvalue-adding activities, increases activity occurrences, and increases the rate of return.