I Swear This Really Happened!!!

"Excuse me."
"Yeah?"
"Oh no, never mind." The customer said and walked away.
ok.
"Oh wait." He said and came back to me.
-_- "Yeah?"
"I have a 20 and a 10. How much is that?"
"$30."
"And another 5 is 34."
"$35"
"Maybe I should save my money?"
"You can do whatever you want."
"Is Avengers a good movie?"
"Yes."
"Should I spend my money on Avengers?"
What am I, your accountant?