On July 4, the law firm Andrade y Asociados S.C. acquired a state-of-the-art machine to rubberize the opinions and other documents they deliver to their clients. The price of the machine was $30,000 and it is estimated that it will be able to perform 10,000 gumming during its useful life. In addition, $2,000 was invested in installation and $1,000 in staff training. At the end of its useful life, the machine is estimated to be worth $2,000. It makes the following rubber bands: January 50, February 70, March 310, April 92, May 40, June 38. Determine the: a) depreciation expense per rubber band b)the depreciation expense for the month of March c) the accumulated depreciation at June 30. Show the entire procedure performed and formulas used.