Alpine Expeditions operates a mountain climbing school in Colorado. Some clients pay in advance for services; others are billed after services have been performed. Advance payments are credited to an account entitled Unearned Client Revenue. Adjusting entries are performed on a monthly basis. An unadjusted trial balance dated December 31, 2011, follows. (Bear in mind that adjusting entries have already been made for the first 11 months of 2011, but not for December.)

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 20 units at $1,800 may 15 purchase 31 units at $1,950 aug. 7 purchase 13 units at $2,040 nov. 20 purchase 16 units at $2,100 there are 18 units of the item in the physical inventory at december 31. determine the cost of ending inventory and the cost of goods sold by three methods, presenting your answers in the following form: round your final answers to the nearest dollar. cost inventory method ending inventory cost of goods sold a. first-in, first-out method $ $ b. last-in, first-out method $ $ c. weighted average cost method $ $