Final answer:
To revise question 11 regarding the cost of production, the beginning inventory of $8,400 must be added to current period costs and adjusted for any ending inventory to determine the cost of goods manufactured.
Step-by-step explanation:
To revise the answer to question 11 with the information provided that the company had beginning work in process inventory of $8,400, we need to consider this inventory as part of the costs of production. The beginning inventory needs to be added to the total costs incurred during the current period before deducting the amount allocated to the ending inventory (if any), to calculate the cost of goods manufactured. If question 11 pertains to calculating the cost of goods sold or the cost of goods manufactured, this beginning inventory will significantly impact the calculations.