Watson Tax Planning Service has the following plant assets: Communications Equipment: Cost, $6,880 with useful life of eight years: Furniture: Cost, $22,800 with useful life of 12 years; and Computer: Cost, $13,600 with useful life of four years. (Assume residual value of all the assets is zero.) Watson's monthly depreciation expense calculated using the straight - line method is(Round any intermediate calculations to two decimal places, and your final answer to the nearest cent.) OA. $71.67 O B. $513.33 O C. $283.33 O D. $158.33