Looks like their convention is to list the malts in descending order, and on their other beers they list "Pale" first, which implies this one is majority Munich, which is pretty weird. Maybe it's just an error, or maybe they distinguish between "Pale" malt and "Ale" malt, and just leave the "Ale" malt out of all their labels.
(EDIT: Nope - many of their beers list both Pale and Ale in the malts section, so unless this one breaks with their convention, it really does have a big whack of Munich!)
Without knowing what's going on there, I'd be very cautious about proceeding to design a recipe, because I really wouldn't expect more than....say 20% tops Munich in an IPA.
Wheat is probably around 10%, Carahell probably 2-5%....if I had to guess I'd say 15% Munich, which leaves 70-73% base malt.
But maybe it really is largely munich, lightened up by a LOT of malted wheat? I guess you could do that...haven't run the numbers at all though. If I was going down that path I guess I'd start with about 50/45/5 Munich/Wheat/Cara and adjust those ratios until Beersmith says the colour is right...