Question: What is the difference between perpetual and periodic inventory system?
Details: 1//03 beginning inventory 50 units @ $30
2/22 purchase 70 @$33
3/7 sale(sold) (100)
4/15 purchase 90 @ 35
6/11 purchase 140@ 36
9/28 sale (100)
10/13 Purchase 50@ 38
12/4 sale (100)