Final answer:
To calculate the cash balance at September 30, 2017, we add the cash collected and subtract the cash disbursements from the initial cash balance.
Step-by-step explanation:
To calculate the cash balance at September 30, 2017, we need to consider the cash collected and cash disbursements during the month.
Starting with the initial cash balance of $123,200, we add the cash collected of $52,800 and subtract the cash disbursements of $88,000.
Therefore, the cash balance at September 30, 2017, is $123,200 + $52,800 - $88,000 = $88,000.