The context of the following conversation is Robin was certain she was going to make the sale and spent her commission before she had it.  The sale fell though so Robin had put the cart before the horse.:
Robin says Oh my goodness! The sale fell through..
The friend responds Ok. Sales fall through all the time. What's wrong?.
Robin responds I really thought this one would go through and I spent the money already..
The friend responds Oh no! What did you spend the money on?.
Robin responds I bought my son a brand new car. He needed it for college..
The friend responds I guess you have to take it back and buy a used car..