Hi all!
I have been lusting over this sweater from Berroco for like a year:
http://www.berroco.com/exclusives/ben/ben.html
The downside was the yarn requirement, wanted something luscious, but at 25 or 27 balls, affordable wasn’t fitting into the equation. A LYS here is going out of business and I managed to swipe up 21 balls of Nashua Julia, originally for the Cobblestone Sweater from IK, but the yarn has spoken to me and wants very much to be cables. 
Since I’ve been lusting over this so long, of course I was considering it, but I am obviously short yarn. I posted a question about mixing dye lots, to which I got great responses to and that will remain an option because I have found it being sold online, but I had an idea that I need help with, though.
The pattern as written has that cable pattern on both the front and back. It occurred to me that I could lose the cabling on the back to conserve yarn because I know the cables are what’s eating it up, and really I think I would prefer that for fit reasons anyway and so it’s a little less busy, just a 2x2 rib or stockinette. Does anyone know any kind of calculation to figure like what percentage of that 27 balls is going into each section of the sweater? I figured what I would do is start the front, work a ball or two, and that will give me an idea, but I just don’t want to find myself in a cranky pinch so figured I’d ask. I wouldn’t be opposed to modifying the sleeve so the cable only appears down the center of the arm a la Durrow from Magknits…
Thanks so much!