It's pretty straight forward using EZCalc. Use the mean column for your average.
Adjust the Gypsum, Chloride & Epsom salts until you are happy with your PH if It's high like mine taking note of the recommended levels according to Palmer.
A very nice water to start from. It is very soft having low minerals levels, low alkalinity buffers and neutral pH so you can build your profile using the additions Crusty mentions.