John's 8-year-old Chevrolet Trail Blazer requires repairs estimated at $6000 to make it roadworthy again. His wife, Sherry, suggested that he should buy a 5-year-old used Jeep Grand Cherokee instead for $6000 cash. Sherry estimated the following costs for the two cars:



The cost NOT relevant for this decision is the ________.

		repairs to the Trail Blazer
		acquisition cost of the Trail Blazer
		acquisition cost of the Grand Cherokee
		annual operating costs of the Grand Cherokee