Cost of replacement of tensioner and rollers. on 1997 Mazda Millenia

I have not had any problems but because of the age and 48000 miles, it has been recommended that I replace the timing belt, water pump, tensioner, rollers, drive belts, radiator hoses and coolant flush. I could not find the estimated cost of replacing the tensioner and rollers. What are they?

Asked by for the 1997 Mazda Millenia
part of the timing belt replacement. we do this job for 800-1000 for everything