I do not know where to start or how to do it.

aintains a perpetual itwentory system. Determine the cost af goods sold for esch sale and the inventory balance after each sale, assuming the first in, first-out methed data in the form alustrated in Exhibit 3. Under FIFO, if units ate in inventory at two different costs, enter the units with the LowER unit cost first in the Cost of Goods Sold Mlumn and in the Inventery Urit Cost column. The firm maintains a perpetual imventory system. Determine the cost of goods sold for each sale and the imwentory balance atter rach sale, asuming the first in, first-out method. Present the data in the form illustrated in Exhibit 3. Under FFO, if units are in imveotory at two different costs, enter the inits with the Lowek unit cost first in the Cost of doods Soid Unit Cost column and in the Inwentory unit cost cotumn. Perpetual imventory using FFO Thit follewing units of a particular item were avalable for sale during the calendar year:Unit Cost column and in the Inventory Unit cost colimn