you can save a whole lot by cooking up your own snacks.. wake up earlier and get your meals packed and bring them to work in a big ass bag, like me.. lol.. need protein for snack? no problem go oven-grill that chicken breast (grill like 3 or 4 of them for your snacks) need carbs? no problem, go cook your red/brown rice the day before, store them and all you need to do is re-heat!, cannot live without greens for snack? no problem, there are so many greens out there you can eat raw and easy to prepare just fricking chop them.... complaining your snack tastes like shit? no problem... there is always tabasco hot sauce yum yum...

for the oil question you can get some idea from this article : http://www.t-nation.com/readArticle.do?id=1651364

this is how i take my oil, fill some olive oil (extra virgin) into a small container and bring them with you.... fish oil? just pack some caps with you... dont like both? go eat oily fish like salmon