it says that most of the problem is wrong. Did you later come with different answers? This is for FIFO not lifo

Perpetual inventory using FIFO The following units of a particular item were available for sale during the calendar year: The firm maintains a perpetual inventory system. Determine the cost of goods sold for each sale and the inventory balance after each sale, assuming th illustrated in Exhibit 3. Under FIFO, if units are In inventory at two different costs, enter the units with the LOWER unit cost first in the Cost of Goods So The following units of a particular item were avallable for sale during the calendar year: FIFO Method