12 .please i need the answer

Mazaya Company developed the following reconciling information in preparing its June bank reconciliation Cash balance per bank, 6/30 R.O. 8,000; Note receivable collected by bank 3,200; Outstanding checks 4,800; Deposits in transit 2,400; Bank service charge 40; NSF check 640. Determine the cash balance per books (before adjustments) for Mazaya Company Select one: O a. R.O. 10,400 b. R.O. 3,080 C. R.O. 6,280 Od. R.O. 8,000