A business has 20 workers employed as production staff. Each worker works 40 hours per week, earning $7.80 per hour. The bonus equals 20% of basic rate pay per hour for every product made above 120 units for each employee. During one week, each employee made 145 units. What was the total wage bill for the week?
- A$7020
- B$9984
- C$10764
- D$10920