A customer came in and purchased an item that is to be delivered at a later date. Payment has been taken. Upon review of the contract, we noticed the amount charged was incorrect, and our salesperson admitted to the huge mistake. This was an honest mistake. When we called the customer to clarify the mistake, they claimed that since they signed a contract, we could not void the contract, and had to offer the goods and the price signed for. Is this true? Under what circumstances can a company refuse service or void a contract to a customer if there is nothing stated in the contract about cancellations by either party?