The per-unit standards for direct labor are 1.5 direct labor hours at $15 per hour. If in producing 2,400 units, the actual direct labor cost was $46,000 for 3,000 direct labor hours worked, the total direct labor variance is Select one: O a $5,000 unfavorable. O b. $2,400 unfavorable. Oc. $8,000 unfavorable. O d. $8,000 favorable