The following lots of Commodity Z were available for sale during the year.

Line Item Description	Units and Cost
Beginning inventory	9 units at $51
First purchase	18 units at $54
Second purchase	25 units at $22
Third purchase	18 units at $63

The firm uses the periodic inventory system, and there are 25 units of the commodity on hand at the end of the year.

What is the ending inventory balance of Commodity Z using the weighted average cost method? Do not round intermediate calculations. Round your answer to the nearest whole dollar.

a. $1,275

b. $1,288

c. $1,113

d. $1,323