Balance of Work in Process and Finished Goods, Cost of Goods Sold

Derry Company uses job$-$order costing. At the end of the month, the following information was gathered:

The beginning balance of Finished Goods was $$300,$ consisting of Job $300,$ which was not sold by the end the month.

Required:

Calculate the balance in Work in Process at the end of the month.

Calculate the balance in Finished Goods at the end of the month.

Calculate Cost of Goods Sold for the month.