Harry entered into a contract with Sally in which she was to pay $50,000 for Harry's hunting cabin. All negotiations, witnessed by various third parties, stated the $50,000 figure as the sales price. When the contract was written, a typographic error was made indicating a price of $5,000. At settlement, Sally tendered $5,000 and demanded the deed in accordance with the written contract. Must Harry sell the cabin for $5,000?