I always thought that av gas was the same as car gas, the price quoted was including all taxes. But as it turns out at my home field KAKH, they add the %7 sales tax to the total. It is what it is. This is full service, there is no SS fuel there. My question is, when searching around on sites such as 100LL or others, or the fuel prices that may be visible on a flight app, do they all use the same formula as to quote the price before sales tax? Seems like to me they should quote just like regular gas stations.