"Signature nomatterwhere, how can I help?"
"Yes, I'm flying to justthere tomorrow and am looking to park my bugsmasher for the night, what are your ramp fees?"
"Our ramp fee is $42 for an overnight parking, and it can be waived with a 15 gallon purchase"
"Ok, thank you, see you tomorrow"
*** flight happens ***
tomorrow +1:
"Hi, I'm about to depart and I just bought 15 gallons of fuel, can I pay for my fuel?"
"Yes, your total is $194.50"
"Hmm, your AVGAS is $8.90 per gallon, 15 gallons should be $133.50?"
"Yes, but there is a Security Fee of $15, your Facility Fee of $30, and your used-the-coffee-maker fee of $16".
This is way too common with the big brand FBOs. (ed. note. I use Atlantic, because they have always been upfront about them with me).