The inventory data for an item for November are: Nov. 1 Inventory 4 Sold 10 Purchased 17 Sold 30 Purchased 20 units at $20 10 units 30 units at $21 20 units 10 units at $22 Using the perpetual system, costing by the last-in, first-out method (LIFO), what is the cost of the merchandise inventory of 30 units on November 30? $610 O $640 $620 S630