The math I got: if the strips run vertical it's pretty easy. The length, about 86, would be two strips. The width, about 90, would be 45 strips across. That's 90 strips, give or take a few.
If the strips run horizontal, the width would be approx. 2 1/2 strips and 45 strips down. That's about 112 strips. I have 2 jelly rolls, lots of individual plain neutrals from swaps and several WOF strips I have cut from other projects. I have wondered, though, I also have lots of partial 2 1/2" strips (not quite WOF) but hesitate to use them because of the seam-butting problem. What do you think? Should I take my chances?