FAR-Inventory

Gross Purchases
      -Purchase Discount
      -Purchase R+A(Returns and Allowences
Net Purchases
      +Freigh-In/Transport
COG Purchased

 Beg Inv
+COG Purchased
Cost Of Goods Available for Sale
-Ending Inventory
COGS

Periodic System
  Beg Bal 200 @ 1.50 = 300
  1/05 Pur  200 @ 1.60 = 480
  1/18 Pur 200 @ 1.65 = 330
  1/27 Pur 300 @ 1.78 = 534
COG Available for sale   1,644

Fifo/Lifo
    Sold 600 Units
300 @ 1.78 = 534
200 @ 1.65 = 330
100 @ 1.60 = 160
EI            1024 Under Fifo

COGAS  -  Ending Invenory    COGS
1644                620              1024

Periodic System 
Beg Bal 200 @ 1.50 = 300 
1/05 Pur  200 @ 1.60 = 480 
1/18 Pur 200 @ 1.65 = 330 
1/27 Pur 300 @ 1.78 = 534
COG Available for sale   1,644

Lifo    
Sold 400 Units
200 @ 1.50 = 300
300 @ 1.60 = 480
100 @ 1.65 = 165
EI            945 

Under Fifo
COGAS  -  Ending Invenory    COGS
1644               945              699

Periodic System  
Beg Bal 200 @ 1.50 = 300  
1/05 Pur  200 @ 1.60 = 480
 1/18 Pur 200 @ 1.65 = 330 
1/27 Pur 300 @ 1.78 = 534
COG Available for sale   1,644

1644/1000 = 1.644

600 * 1.644 = 986.4 Ending Inventory

Cogas    Ending Inventory  = COGS
1644 -      986                     657.6

Perpetual System

    -Beg Balance    200 @ 150 = 300
    -1/5 Purchase   300 @ 160 = 480
                          500 @           780
 
  -Sell 400            200 @ 150 = 300
                          200 @ 160 = 320
                           COGS          620

Balance      100 @1.60 =  160
            Pur 200 @ 1.65 = 330
            Pur 300 @ 1.78 = 534     
                 600      EI    =1024

Sale   400 
300 @ 1.60 = 480
100 @ 1.50 = 150
COGS           630

New Balance
Pur 100 @ 1.50 = 150
Pur 200 @ 1.65 = 330
Pur 300 @ 1.78 = 534
     600      EI    =1014

Beg Bal
200   @ 150 = 300
300   @ 160 = 480
500                780

Have to take the Unit Cost and Divide by the

Inventory

Unit
Cost Inventory




780
/ 500 = 1.56/Unit