The inventory data for an item for November are: 5 nline Nov. 1 Inventory........ 20 units at $20 4 Sold.. 10 units at $50 10 Purchased......... 30 units at $21 17 Sold.................. 20 units at $50 30 Purchased.... 10 units at $22 Using the perpetual system, costing by the first-in, first-out method, what is the gross profit on November 30? $1500 O $610 $890 5880