Chlorine/bleach in calculator

Ok forgive me if I ask stupid questions...maybe someone else needs an answer too but I'm going to be a genius at this BBB method no matter what. Now the pool calc says add_____ amount of bleach and gives a percentage. Now where would I insert 12% LC? I get my Chlorine from the pool store. Please advise..Dave

Are you using this calculator?
http://www.poolforum.com/pf2/showthr...18-bleach-calc

This one is pretty easy.

Unfortunately, I have tried to download several times but just get unexpected error every time