We are collecting urine over a 24 hour period in research respondents, and are getting quotes from labs to run n=1000 urine aliquot samples for sodium, potassium and creatinine. About how much are you getting charged per respondent per assay? Or for the bundle of all 3? We've had a wide range of quotes - as you might imagine. Is about US$10 for the bundle of 3 reasonable? Why isn't this type of info shared between researchers more?