remember to allow for shrinkage - I've had fabric shrink over two inches in width - and up to two inches in length
I've found it helpful to draw things out on graph paper and then making my calculations from that.
If I was piecing "crosswise" - and only wanted two seams, I would also buy at least 8.75 yards of fabric (to allow for uneven ends, etc)
(92 for quilt + 8 inches for LAQ + 3 inches for shrinkage + 2 inches for wonky cut) for each length x 3 lengths.
105 x 3 = 315
315/36 = 8.75 yards
If I was willing to piece one section, then I think I could "get by" with 7-5/8 yards of fabric