12- A company had the following purchases and sales during its first year of operations: a) b) January: February: May: September: November: Purchases 10 units at $120 20 units at $125 $8,670. $5,400. $5,130 $3,540 $3,270. 15 units at $130 Sales 6 units 5 units 12 units at $135 10 units at $140 On December 31, there were 26 units remaining in ending inventory. Using the Periodic FIFO inventory valuation method, what is the value of cost of goods sold? (Assume all sales were made on the last day of the month.) 9 units 8 units 13 units