帮忙解一道ACCA F3试题呗.

帮忙解一道ACCA F3试题呗.
刚开始学,上周还逃课了,下面这道题帮忙解一下呗,谢谢了
Bob used the following balances to prepare his accounts as at 30 April 2013.
receivables Dr 6,000
Bank loan Cr 3,000
Bank overdraft Cr 2,500
Drawings Dr 4,100
Capital Cr 12,500
Revenue Cr 22,000
Purchases Dr 19,200
Rent Dr 5,400
Bank interest Dr 825
Heat and light Dr 4,475
Totals Dr 40,000 Cr 40,000
The business does not hold inventory. no further adjustments were required.
What is Bob*s opening capital figure as at 1 May 2013?
抱歉,没财富值了.