bank reconcialiation

the bank statement as at 31st october 1997 showed an overdraft of $800. on reconciling the banks statement , it was discovered that a cheque drawn by your company for $80 was not presented for payment , a cheque for $130 from a customer has been dishonoured on 30th october 1997, but this had not been notified for u by the bank. the correct bank balance to be show in the balance sheet as at 31st october 1997.

the answer I get for this question is $930 , but this answer is not available in the answer options …its supposed to be $880….I do not understand how it came to that ..I would really appreciate if someone could please help