i think its c but im not sure

2. At the beginning of Year One, Londonderry had 50 units in its inventory, cach costing $4. In January, Londonderry purchased 30 units for $5 each. On January 31, Londonderry sold 20 units. Assuming a LIFO cost flow assumption, what would be Londonderry's cost of goods sold? a. $200 b. $100 c. $150 d. $1201 e. $80