Lol, the above response sounds like it was written by a DSW employee.
It would have been so simple for Maria to have received her $70 difference back. She could have returned her shoes and bought a new pair at the clearance price. But if she had already worn the shoes, then she could have bought another pair of the exact same shoes on clearance and then returned them with the receipt she received for the first pair. Some would argue that this is dishonest - and to those I say, don't do it.