Addison, Inc. uses a perpetual inventory system. The following is information about one inventory item for the month of September:

Sept. 1	Inventory	20 units at $25
4	Sale	10 units
10	Purchase	30 units at $30
17	Sale	20 units

If Addison, Inc. uses the weighted average method what is the ending inventory at September 30? The formula for the weighted average method is: Total cost of goods available for sale / # of units available for sale.