Menon Trading records showed the following purchases and sales for the month of January 2015: 5 January Purchased 500 units for $10 each 15 January Purchased 700 units for $11 each 20 January Sold 600 units for $14 each 25January Sold 120 units for $15 each The inventory balance at the beginning of January is 150 units at $8 each. Menon Trading values its closing inventory using the periodic last-in-first-out method. What is the amount of cost of goods sold at 31 January 2015 (to the nearest $1)?