My math is that for something worthless like bananas, the fuel I buy to bring them a couple miles from the store costs more than the fuel to ship them to the st

My math is that for something worthless like bananas, the fuel I buy to bring them a couple miles from the store costs more than the fuel to ship them to the store. Of course they truck rather efficiently, but they also sell for ~nothing. How does it work then that the trucking cost is the primary component of the price? Or do you mean something different by "Guess which expenses impacts most prices, the most? Did you guess trucking? If so, you're correct."?