Under a traditional job costing system, Kenneth understood that his primary product included direct costs of $7.20 per unit and indirect costs of $4.40 per unit. The activities used to generate that product involved machine setup, material moves, and assembly. Using ABC, Kenneth's MOH costs allocated to his primary product are $2.30 per unit. Calculate and compare the total product cost per unit under the traditional method and the ABC method. If Kenneth currently sells this product for $17.50 per unit, what gross margin percentage is he generating under each method? (Round answers to 2 decimal places, e.g. 15.25\%.)