A businessman purchases a workshop for $200000 in order to produce plastic boxes. During its first year of trading, he spends $70000 on materials, hires ten production workers who are paid according to output (piece rate) at a total cost of $80000, and buys two delivery vehicles for $10000 each. What is the total of his variable costs?
- A$100000
- B$150000
- C$220000
- D$370000