Use the information below to answer the questions that follow. Enter your answers using digits only - no dollar signs, commas, or decimal points. The business's year-end is December 31. Cost of equipment = 600000; Useful life in years = 11; Residual value = 15900; Date purchased = November 30. (1) What is the depreciation expense per year? (2) What is the depreciation expense per month? (3) What is the depreciation expense in the year of purchase? .