\(\begin{array}{c|c}
\text{Capital} & 12,700 & \text{Purchases} & 7,100 \\
\hline
\text{Debtors} & 4,000 & \text{Stationery} & 1,900 \\
\hline
\text{Sales} & 2,400 & \text{Wages} & 1,230 \\
\end{array}\)

Determine the closing balance of the cash book?