How to solve these preferably on a notebook not excel

On July 1, 2003, PLEE Corporation purchased factory equipment for $50,000. Salvage value was estimated at $2,000. The equipment will be depreciated over 10 years using the double-declining-balance method. Counting the year of acquisition as one-half year, PLEE should record 2004 depreciation expense of a. $8,640 b. $9,000 c. $8,000 d. $10,000 e. None of the above