A difference in GAAP-based product costing and activity-based costing is that under activity-based costing Answers A-D A sales less cost of goods sold is classified as gross profit, whereas under GAAP this subtotal is titled contribution margin. B all costs are traceable, whereas in GAAP-based costing some costs are allocated. o Cselling and administrative costs are allocated to products if they are incurred to provide resources that are consumed by unit-level, batch-level, or product- level activities. D all costs are classified as product and period costs, whereas under GAAP they o are classified by behavior