Strait Corporation uses the following standard costs for a single unit of product Direct labour (5 hours @ 512 hour) Variable overhead (4 hours 57/hour) Actual data for the month showed variable overhead costs of $524,000 for 20.000 units produced What is the difference between actual variable vehead costs and standard with vacated to products O A. $38,000 favourable OB. $36.000 favourable OC. $38,000 unfavourable OD. $36,000 unfavourable