2. Materials costing methods. The following information is to be used in costing inventory on October 31: October 1. Beginning balance: 800 units @ $6 5. Purchased 200 units @ $7 9. Purchased200 ?

units @ $8

15. Sold 500 units

20. Purchased 300 units @ $9

25. Sold 400 units

30. Purchased 100 units @ $10

Using the weighted average costing method, the cost of goods available for sale is calculated as follows:

Beginning balance: 800 units @ $6 = $4,800
Purchased 200 units @ $7 = $1,400
Purchased 200 units @ $8 = $1,600
Purchased 300 units @ $9 = $2,700
Purchased 100 units @ $10 = $1,000

Total cost of goods available for sale = $11,500

Total units available for sale = 800 + 200 + 200 + 300 + 100 = 1,600 units

Weighted average cost per unit = Total cost of goods available for sale / Total units available for sale
= $11,500 / 1,600 units
= $7.1875 per unit

To calculate the cost of ending inventory on October 31, we need to determine the number of units remaining after the sales transactions:

Beginning balance: 800 units
Purchased: 200 units + 200 units + 300 units + 100 units = 800 units
Total units available for sale = 1,600 units

Units sold: 500 units + 400 units = 900 units
Units remaining in ending inventory = Total units available for sale - Units sold
= 1,600 units - 900 units
= 700 units

Cost of ending inventory on October 31 = Units remaining in ending inventory x Weighted average cost per unit
= 700 units x $7.1875
= $5,031.25

Therefore, the cost of ending inventory on October 31 using the weighted average costing method is $5,031.25.

The information provided does not include the unit cost of the 200 units purchased on October 9. Therefore, I cannot provide a complete answer to this question.

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