How many sandwich combinations are available at subway?

I would like to see who can figure out how many sandwich combinations can be made when you order at subway

HINT: There are over 2,000,000 sandwich combinations available
Update: I am trying to see who can get an exact number, I am telling everyone there is over 2 million, but not the exact number
Update 2: Well if you include the option to mix and match meats, subway has a total of

40,156,400 different sandwich combinations that you can order. I might have missed a couple of ingredients not offered at all stores so give or take a million.
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