Alpha company makes a single product and uses a standard costing system that applies overhead on the basis of direct labor hours. For the most recent period, the VOH spending variance was $80,000 F, and the VOH Efficiency Variance was $100,000 U. The company budgeted making 4,800 units at 3.5 hours each with $924,000 of VOH. The company actually produced 4,000 units. How many direct labor hours were used?