S.M.
C.,
I don't think your parents would have any trouble understanding your situation especially since you just used your bill money to buy the clothes that they intended to buy with their monetary gift. If they don't know about your current financial struggles, maybe try talking to them. Parents make for good listeners most of the time. If you don't want them to know about your situation, then just thank them for the gift and know that things always work out for a reason. Someone knew that you needed a little help right now and it just happened to come from your parents. No shame in that!