问答题
Tommuy's payable control account contains the following entries in the year ended 31 May 20X2:
Bank payments $75,600
Credit purchase $82,000
Return outwards $4,200
Discount received $500
Contra $1,500
Closing balance at 31 May 20X2 $12,500
There were no other entries in the account.
What was the opening balance at 30 April 20X1?
$______