b. Debit Work in Process Inventory $160,000; credit Factory Payroll Payable $160,000.
Explanation:
In order to record the cost of goods manufactured, once the goods are finished, you add up all the work in process debits. The following journal entry would be:
Dr Finished goods inventory
Cr Work in process inventory (all added up)
In this case, since you are recording labor usage, you must also credit wages or payroll payable (that correspond to the amount of labor used to manufacture the goods).
