31. ABC Company had the following balances and transactions during 2009. Beginning inventory 10 units at $70 per unit March 6 purchased 9 units for $71 per unit March 10 sold 8 units for $100 per unit June 10 purchased 20 units for $81 per unit October 30 sold 15 units for $100 per unit Operating expenses for 2009 was $345 in total. What is total cost of goods sold for 2009 if the perpetual FIFO costing method is used? (3 Puan) $1,663 $1,659 $1,695 some other amount