Question on AVGAS stored at the field

For any of you who might know;

When the owner is storing Avgas at the local FBO, do they bear the price
exposure for swings in the market prices of the fuel they have in
inventory, up or down? Or does the supplier (e.g. Texaco, P66) provide
a hedge for the fuel in inventory.

E.g. let's say you buy 1000 gallons at $4 / gallon, and it took you two
months to sell that off, over time the wholesale price of fuel increased
to let's say $5.50. Did you just make money by being able to charge
more for that slug of fuel sitting underground? And vice-versa --
losing money as prices come down (as they have just a bit now).

Or does your supplier provide price protection. E.g. by shorting some
futures that are correlated to the price of gasoline, then passing on
the hedge insurance to you.

Now, wrong group, but just in case anybody knows, what is the typical
practice for the same question at the typical auto fuel stations (car,
not plane, just to be clear)? Does the owner bear exposure to price
swings for fuel that is in inventory?

T