Marin Company's general ledger indicates a cash balance of $22,640 as of September 30,2021 . Early in October Marin received a bank statement indicating that during September Marin had an NSF check of $1,800 returned to a customer and incurred service charges of $50. Marin also learned it had incorrectly recorded a check received from a customer on September 15 as $200 when in fact the check was for $220. Calculate Marin's correct September 30, 2021, cash balance