10" blocks from fat quarters is NOT good. FQs are 18" x22" in the US - so you only get 2 10" blocks and you have a strip 8x20 left over
How about adjusting your sizes, and using 9" unfinished? Then you get 4 blocks per FQ?
For what you have planned, you need 56 blocks - so that's 11 of each colour (plus 1 extra from one of the colours). Cutting from yardage, you get 4 blocks per 10" strip - so 30" of each fabric would do. But as I said, if you are buying FQs, you are going to need 27 of them in total.
If you use 8" finished blocks, you could make the quilt 64x72. That's 8 blocks by 9 blocks. So 72 blocks required. Cut 4 9" blocks from each FQ, and you need a total of 18 FQ to make the quilt. From yardage, that would be 5 blocks per strip, 3 strips of each colour, so 24" of each fabric.
Make sure if you buy yardage you add 3-4" for shrinkage and straightening the edges!
Hope this helps.