Using the average cost method, the amount allocated to the ending inventory on June 30 is 2. $4,200. b. $2,400. C. $1,794. d. $1,800. On October 1, 20l uncan Company places a new asset into service. The cost of the asset is $12,000 with an estimated 5-year life and $3,000. salvage value at the end of its useful life. 29 What is the depreciation expense for 20f Duncan Company uses the straight- line method of depreciation? a. $450. b. $2,400. c. $600. d. $1,200. 30 What is the book value of the plant asset on the December 31, nol alance sheet assuming that Duncan Company uses the double-declining-balance method of depreciation? $7,800. a. b. $9,000. c. $10,800. d. $11,400