A company uses standard costs to calculate the costs of production. It has calculated that for each unit of production 2 direct labour hours are required at 9 per hour. In the current month the company has produced 1,200 units. The actual direct labour cost was 19,200 for 2,000 direct labour hours worked. What was the total direct labour variance? O a. 1,200 unfavourable O b.1,200 favourable O c. 2,400 favourable d. 2,400 unfavourable