Q62 National Detergent Co had the following transactions for a period for a particular line of Inventory for the month of January 1st Jan Purchased 60 tonnes @ $20 per tonne 10th Jan Sold 30 tonnes 25th Jan Purchased another 30 tonnes at $22 per tonne The business uses FIFO as its way of dealing with inventory flow assumptions. The value of closing stock at the for the month of January is