Answer:
Work in Process Inventory account at the end of September is $1,950
Step-by-step explanation:
As all jobs at the beginning of september in the balance of Work in progress were finished, it's costs are now in Finished Goods Inventory. So are too, the two jobs started and finished during September. The Works in Process account records materials, labor and structure costs of order not finished yet at the end of the month.
At the end of september only Job 850 is not finished. The sum of materials, direct labor and overhed that is $1.950, is the balance of Work in Process Inventory account at the end of September.