Not including borders and sashings, but just for making 13 of the blocks, you will need
Color 1: 26 strips at 4", or 2.88 yards. buy 3 yards
Color 2: buy 3 yards
Color 3: 13 strips at 3.5" is about 1.2 yards. Add that to 26 strips at 4". Buy 4 and 1/3 or 4 1/2 yards. You will have extra of this, as you only need to make one rectangle from each 3.5" strip.
This is a very GENEROUS estimate, because it assumes that you are using every inch of the 4" strips.