Elements of Labor and Variable Overhead Variances Chelsea Fabricating applies variable overhead to products on the basis of standard direct labor hours. Presented is selected information for last month when 10,000 units were produced. Required Solve for items "a" through "h." Elements of Labor and Variable Overhead Variances Chelsea Fabricating applies variable overhead to products on the basis of standard direct labor hours. Presented is selected information for last month when 10,000 units were produced. Required Solve for items "a" through "h