Rainey Company's true cash balance at October 31 is $4,260. The following information is available for the bank reconciliation: Outstanding checks, $680 Deposits in transit, $510 Bank service charges, $105 The bank had collected an account receivable for Rainey Company, $1,150 The bank statement included an NSF check written by one of Ramsey's customers for $690. What was the unadjusted book balance at October 31?