Periodic inventory by three methods; cost of goods sold

The units of an item available for sale during the year were as follows:

Jan. 1 Inventory 50 units at $130

Mar. 10 Purchase 70 units at $140

Aug. 30 Purchase 30 units at $148

Dec. 12 Purchase 50 units at $154

There are 40 units of the item in the physical inventory at December 31. The periodic inventory system is used.

Determine the ending inventory cost and the cost of goods sold by three methods. Round interim calculations to one decimal and final answers to the nearest whole dollar.