A small company heats its bulding using a gas fumace. If expects to spend $9,180 on naturd gas this fint yoar. The cost of the natural gas is expected to increase by at per year every subsequent year. There is aso the maintenance cost on the gas furnace which is expected to be $874.00 in the Srst year and to increase by 15% per year every subsequent year. The planning horken is 14 years and the company uses an annual intereat rate of 20% for economic analysis of its investments (a) The projected annual cost of ratural gas in year 14 is 1 . (Round to rearest dolar) (b) The sropectes annual mainanance cost of the furnace in year 14 is f (Round to nesrest dolar) (c) The lotal present worth of cperaing and maintaining the furnoce over the 14 yean is 3 (Round to nesrest dotian)