Sorry about the late answers, I was on holiday and didn’t have access to a computer.
pjnesler: Yes, that is the pattern. I don’t know if you own the book, but if you do you can see that the fabric requirements given are approximations so I can’t guarantee 7 meters will be enough just because it is just a little more than the 7.5 yards the pattern uses .
catmcclure: Just reading that made me go cross-eyed. I think I lost track of the calculations somewhere in your first sentence. It also doesn’t help that each block is different – I would have to calculate background fabric requirements for each separate block.
stitchofclass2: I thought of trying to get more of the second fabric and use just that, but they don’t have enough in stock (not nearly enough, just 1 meter more), so I would end up with the same problem.