please help

On October 1, 2021. Waterway Company places a new asset into service. The cost of the asset is $135000 with an estimated 5-year life and $13200 salvage value at the end of its useful life. What is the book value of the plant asset on the December 31, 2021, balance sheet assuming that Waterway Company uses the double-declining-balance method of depreciation? $107730 $121500 $13770 O $56610