I don't understand the ratio part. please help.

The bank statement for Adcock Company indicates a balance of $830 on July 31. The cash balance per books had a balance of $1,598 on this date. The following information pertains to the bank transactions for the company. Deposit of $840, representing cash receipts of July 31, did not appear on the bank statement. Outstanding checks totaled $390. Bank service charges for July amounted to $30. A credit memo was included in the bank statement for $40 of interest earned. A NSF check for $328 from a customer was returned with the statement. 1. 2. 3. 4. 5. Instructions Prepare a bank reconciliation for July 31 Prepare ratios