Cost Classification. Accurately classify all your costs in the "Cost Classification" tab of your workbook. Identify direct material, direct labor, overhead, and period costs. (Note: Fixed and variable costs have been classified for you.) Variable and Fixed Costs. Complete the "Variable and Fixed Costs" tab of your workbook. (Note: Some costs are provided for you. Fill in only the missing costs.) Determine your total variable cost per unit and the total fixed costs for each product. Show your work using calculations to the side of the table or using appropriate formulas in the table