Need help with the blank blocks with no green check mark

The business maintains a perpetual inventory system, costing by the first-in, first-out method. a. Determine the cost of the goods sold for each sale and the inventory balance after each sale, presenting the data in the form illustrated in Exhibit 3. Under FIFO, if units are in inventory at two different costs, enter the units with the LOWER unit cost first in the Cost of Goods Sold Unit Cost column and in the Inventory Unit Cost column. Cost of the Goods Sold Schedule First-in, First-out Method DVD Players Date Quantity Nov PurchasesQuantity Sold Total Cost Cost of Goods SoldCost of Goods Sold Inventory QuantityUnit Cost nventory Invenlory Total Purchased Unit Cost Unit Cost Total Cost Cost 2,107 559 559 1215 43 V 1,S48 43 V 10 1,215 27 V 45 V Nov 13 559 13 45 24 1,128 30 24 V 47 1,128 30