Ok, here is what I came up with for 1 jelly roll, 1 charm pack, and 3/4 yard of yardage (I think it would look much better in other colours; I drew it in Excel).
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The grey squares are from yardage; cut them to 4.5". Yellow squares are the charm pack; trim them down to 4.5" square as well. Green, orange and blues are jelly roll strips.
Sew jelly roll strips into pairs (20 pairs total). Cut 10 pairs into 8.5" sections. Join them with charm squares to make 10 row A.
Take the second set of jelly roll pairs, and cut each into 4 8.5" lengths and 2 2.5" lengths. Join them with the yardage squares to make 10 row B.
Finshed size will be 56" x 80" - a generous throw.