There are a lot of useful tools on this site under the tools tab at the top of the page. Click on tools, then calculators(male & female) that will help you determine your daily block amount.
THE FAT RULE: There are 3g of fat to a block, we figure the majority of Protein sources to have 1.5g "hidden", so we use 1.5g per Fat block (except egg whites and whey PP, they have no fat so you would figure 3gF). We only count the blocks of Protein from the Protein sources of the meal, (except soy)otherwise the diet would be overwelming.
Say your girlfriend is 11 blocks that means a daily total of 11F/11P/11C, to figure her day she can split the blocks any way that works for her just maintain the count of 3gF/7gP/9gC per block. If her protein source is anything except (egg whites and whey PP)she must utilize 1.5gF/7gP/9gC.
FAQ: "Why don't I count all the protein, carbohydrate, and fat in everything I eat?
You would need a mini-computer to make all the calculations. This is why we devised the Zone 1-2-3 Method™ that takes into account fat content, protein digestibility in low- fat protein, and the insulin-sensitive carbohydrate content of carbohydrates. This makes Zone meal preparation exceptionally simple."
I hope that helps.