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 I have a guaranteed sale coming up. I think I might buy some new clothes..
The friend responds Shouldn't you wait until you make the sale first?.
Robin responds Typically I do that, but this sale is such a sure thing I am willing to spend the money before I get it..
The friend responds Hmm I would't do that, but to each their own..
Robin responds Oh no, I just found out that the sale was cancelled..