I must have close to 50 books and not one of them tell me what I want to know. Every quilt pattern is preplanned or says "after cutting the strips, sew together..."

THAT'S what I want to know, how do I figure out how many strips of each color do I cut to get the desired number of sets to cut into segments to cut and sew together to get the number of needed blocks? Is there a book out there somewhere that EXPLAINS how to do calculations?

My dh gave me the gift of a fab calculator, and together we still come out wrong and I end up having to go back to cutting every time.

I know how to figure out the pattern, the number of patches and yardage I need for each fabric in the pattern. Then I'm lost.

Because my sewing space is so limited in my small home, I must get everything cut and in place, take down my craft table and those supplies in order to set up to sew. It is so frustrating when I come up with wrong answers and have to take the sewing back down, set cutting back up, take down, so repetitive. It would be nice if I had an explanation in detail of how to come up with this answer???

Please don't tell me to just follow the pattern in the book because they are always in sizes that don't apply to my circumstances.There must be some simple equation, but maybe I'm just too dense to see the obvious. HELP PLEASE!!!