The Hawaii Department of Transportation has planned a bypass loop that is expected to cost $9,000,000 and save motorists $820,000 per year in gasoline and other automobile related expenses. However, local businesses will suffer sales losses estimated at $135,000 each year (a) calculate the conventional B/C ratio using a discount rate of 6% per year and a 20-year study period (b) Is the project economically justified if disbenefits are considered? If disbenefits are not considered?