The city of Fredericton operates automobile parking facilities and is evaluating a proposal to erect and operate a structure for parking in the city’s downtown area. Two designs for a facility to be built have been identified (all values are in thousands of dollars): 


 Design ADesign B
Cost of site$ 210$ 185
Cost of building$ 2,189$ 754
Annual fee collection$830$750
Annual maintenance cost$410$360
Service life30 years30 years

Calculate the incremental (A-B) benefit-cost ratio if annual interest rate is 10% 

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