Typically not that little in bulk, unless you stock your own entire soda machines with syrups and carbonation systems and such. If you had people stocking up from sam's club or a similar 'bulk' store, you'd be looking at per unit costs of 25-60 cents per bottled/canned drink, depending on size.

Coffee - not as familiar with the economics of coffee, but of course dedicated machines will end up costing somewhat less than going directly to starbucks.

And most Cokes in a convenience store are now $1.50 or more, at least where I live.