Anna Agrees to Purchase a Television from Huge Buy,a Merchant

Anna agrees to purchase a television from Huge Buy,a merchant electronics seller.Her agreement states that she will pick the television up on Friday at Huge Buy.On Friday morning Huge Buy calls to verify that they have marked the television with her name and it is available for pickup.Anna tells Huge Buy that she can't come until Saturday.Friday evening a huge storm damages the Huge Buy facility,caving in the roof and destroying her television.Huge Buy demands payment from Anna,claiming that it tendered the goods and if she had picked up the television on Friday as originally agreed,there would not have been a loss.Does Anna have to pay? Why or why not.