6. The New Hospital has raised money for a new oncology wing. The hospital has also acquired medical diagnostic equipment that cost $500,000 total. In addition, the hospital had to pay $15,000 to have the equipment shipped to it from the manufacturer, and $40,000 to install the equipment. It is expected that the equipment will have a 6-year useful life, and a $30,000 salvage value. Calculate the six years of depreciation using straight line, double declining balance, and sum-of-the-years digits.