So I've got to return a PCC Combaticons set, but I don't have the receipt. I do have the receipt from a PCC Protectobots set from TRU that I am keeping. (That receipt simply calls it something generic like "5pk combiner.") My question is whether I can return the Combaticon set to TRU with that receipt for a cash refund. I'd prefer to do that than return it without a receipt to Wal-Mart or Target for a gift card.