Amazon charges a flat $5.99 fee per Prime Pantry order now and the order can fill up a box of a certain size (I forgot the dimensions of the box). If you fill up the box and need another one, than they charge even more. The one time that I used Prime Pantry, I ordered about $60 worth of food (mostly bagged pasta, tuna, canned beans, Ravaoli, Tuna Helper, and snack crackers) and the box got filled up roughly 74% of the way (they tell you how full the box is when you are placing the order).

As far as taxes go, Amazon charges tax to residents of any state that has a fulfillment center in it. My state is charged tax now because they are in the process of building a fulfillment center here.

I do agree though that food should not be taxed. At least healthy food shouldn't anyways; that way more people might be inclined to eat healthier since healthy food is so overpriced these days.