A Misunderstanding

I was passing a gas station on the way home from ANOTHER car fix and thought to myself out loud, "Wow, $2.05"
Lexi said, "what?"
Me: "gas"
Lexi: "I don't know, what's $2.05"
Me" "gas"
Lexi: "I don't know, WHAT?"
Me: "gas, oh...GAS, not guess
Lexi: "oh"
Too funny.