What display format do you have it in?
With 9 lbs the unit would have a capacity of 29000 because of the potassium usage.
Gallons would be 2600 or 2 people(60(gallons per day)*2(per person in house) ) at 120 gallons per day would be 21 days.. or you could move the default days to say 19.
Safety Factor or Fixed Reserve , either way works but you should have at least a days usage either way.
Brine Draw 50 minutes
Rapid Rinse 6 minutes
Brine Fill 6 minutes (6*.5gpm=3gallons , 1gallon per 3lbs)
Now the numbers above are what I would be doing based on 20 years of what has worked here where I am and I think that the numbers are close to that of a friend that lives just west of Dallas ..