Answer:
c. $107,000
Explanation:
We can calculate cash collected from the customers by following calculations
Accounts receivable op balance $38,000
Add : Sales on account during year $88,000
Less Closing Balance on Receivables - $19,000
Cash Collected from Customers $107,000
This is the net amount collected on behalf of customers while $19,000 is still recoverable in consequent accounting cycle.
Hope that helps.