I don't know how it works in Texas
Better
gas stations are required to market an all-in price
That's the case in Texas as well, for the gasoline. My example was referring to the things people buy inside the gas station (snacks, sugar, caffeine, caffeinated sugar snacks, etc.). Could've worded it better, apologies.
And the fact that gasoline must be advertised at full-"fare" actually blows a hole in the airline industry's argument that they're the only ones forced to do so.