A business has recorded the following total costs over the previous two months. Month 1: $8000$ units produced, total costs $\$31\,800$. Month 2: $10\,000$ units produced, total costs $\$36\,700$. What was the total fixed cost per month?
- A$\$2440$
- B$\$4900$
- C$\$7340$
- D$\$12\,200$