B'Jza

I can not for the life of me remember where I saw it but I saw a site that sold a spread sheet type percentage calculator. I cant remember what it cost, but there was a cost. and at the time that I saw it, they were out of stock. I thought it was on a label page. Does anyone know what I am talking about and if it is any good. I have looked at the ones at .....byrj, that wasnt it. Any other suggestions? Basically you input all of the ingredients and their amounts, and it calculated the percentages or the other way around. I have found receipes that say 2% of something. I get confused using north and south, I am lost trying to figure out the % of 6 different teaspoons of something.