cant figure out last-in first out method question

Project Description:

problem 4
the beginning inventory of merchandise at citrine co and data on purchases and sales for a three-month period are as follows:
date transaction # of units
per unit
$1,500 2,000 4,800 4,800 2,300 5,000 5,000 2,350 5,250 5,250 2,400 5,400
total
$198,000 216,000 345,600 316,800 220,800 300,000 150,000 282,000 630,000 378,000 432,000 486,000
march 1
8 purchase 108
april 3
may 5
13 sale
21 purchase 28 sale
inventory 132
11 sale 72 22 sale 66
purchase 96 10 sale 60 21 sale 30 30 purchase 120
sale 120 72
180 90
instructions:
1. record the inventory, purchases, and cost of merchandise sold data in a
perpetual inventory record, using the last-in, first out method.
2. determine the total sales, the total cost of merchandise sold, and the gross
profit from sales for the period.
3. determine the ending inventory cost.
Skills Required:
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