When preparing flexible budget, MAYAR Corporation has the following information available for variable overhead costs. Direct labor hours are the cost driver for variable overhead costs. Actual variable overhead costs $5,120 Standard variable overhead costs $3.00 per hour Actual direct labor hours 2,000 hours Standard direct labor hours per unit 3 hours Units produced 1,000 What is the variable overhead spending variance? Select one: a. $3,880 Favorable b. $880 Favorable c. $1,000 Unfavorable d. $3,880 Unfavorable