I'm not an expert, but keep in mind that he is getting liquids from the friuts and veggies that he eating. Also Candy has an awsome website with a spreadsheet on it to help calculate to ca:ph ratios for the different diets out there. He site is:
www.gliderkids.com
go to the diet calculator and put in what you're feeding your baby, and the spreadsheet will tell you the ratios. It's made things so much easier, cause like you, I couldn't for the life off me figure out the math for the ratios. Where are you located and where are you willing to travel for a freind for your little guy?