Marin Company's general ledger indicates a cash balance of $22,740 as of September 30, 2021. Early in October Marin received a bank statement indicating that during September Marin had an NSF check of $1,900 returned to a customer and incurred service charges of $35. Marin also learned it had incorrectly recorded a check received from a customer on September 15 as $500 when in fact the check was for $580.

Calculate Marin's correct September 30, 2021, cash balance.