On January 1, 2004 Grover Company changed its inventory cost flow method to the LIFO cost method from the FIFO cost method for its raw materials inventory. It made the change for both financial statement and income tax reporting purposes. Grover uses the multiple-pools approach, under which it groups substantially identical raw materials into LIFO inventory pools; it uses weighted average costs in valuing annual incremental layers. The composition of the December 31, 2006 inventory for the Class F inventory pool is as follows:

Inventory transactions for the Class F inventory pool during 2007 were as follows:
• On March 2, 2007, 4,800 units were purchased at a unit cost of $13.50 for $64,800.
• On September 1, 2007, 7,200 units were purchased at a unit cost of $14.00 for $100,800.
• A total of 15,000 units were used for production during 2007.
The following transactions for the Class F inventory pool took place during 2008:
• On January 11, 2008, 7,500 units were purchased at a unit cost of $14.50 for $108,750.
• On May 14, 2008, 5,500 units were purchased at a unit cost of $15.50 for $85,250.
• On December 29, 2008, 7,000 units were purchased at a unit cost of $16.00 for $112,000.
• A total of 16,000 units were used for production during 2008.

Required
1. Prepare a schedule to compute the inventory (units and dollar amounts) of the Class F inventory pool at December 31, 2007. Show supporting computations in good form.
2. Prepare a schedule to compute the cost of Class F raw materials used in production for the year ended December 31, 2007.
3. Prepare a schedule to compute the inventory (units and dollar amounts) of the Class F inventory pool at December 31, 2008. Show supporting computations in goodform.

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Weighted Average Units 9,000 3,000 2,000 14,000 Unit Cost Base year inventory-2004 Incremental layer 2005 Incremental layer-2006 Inventory, December 31, 2006 $10.00 11.00 12.50 Total Cost $ 90,000 33,000 25,000 $148,000