lets say I get 6% bleach at $2.50 for the 182oz bottle
I can get a 40lb bucket of tri-chlor whatever is is at Costco for $90 (85% cl)
I can get a 25lb tub of Cal hypo for $75 (60%cl)

Given these prices can someone tel me the which is the lower cost and by how much?
Can you give the answer in a price per 1 or 10 ppm of Chlorine in my 20,000 gal pool?

A 40lb bucket of tri-chlor will raise my Cya how much?
A 25lb tub will raise my CA by how much?

Thanks