Mark's shoe store uses the periodic system to account for inventory financial statements monthly. On Nov 31st, as part of the adjusting entries, mark calculates the inventory sold in the month of November. A physical count reveals that the shop has inventory on hand that is worth $50,000. The ending inventory of October is $40,000. And during November, the shop made one inventory purchase of $40,000. What is Cost of goods and ending inventory balance reported in the monthly financial statements prepared on the Nov. 31st?