A business owner thinks that cash may have gone missing. He gives the figures below: cash balance at the beginning of the month $\$150$; cash balance at the end of the month $\$100$; cash banked $\$10200$; cash sales for the month $\$10500$. What amount of cash has been lost?
- A$\$200$
- B$\$250$
- C$\$300$
- D$\$350$