31. At the end of FY2020, our company reported $100k in Inventory. Over FY2021, we spent another $70k purchasing Inventory. At the end of FY2021, we reported $80k in Inventory on our Balance Sheet. What was our company's Cost of Goods Sold for FY2021? (a) $70k (b) $90k (c) $110k (d) Not enough information without inventory costing mehod (FIFO, LIFO, etc.) (e) None of the above