Selma agreed to buy a used car from Hillary for $2,000. Hillary drew up the contract providing that the exchange would occur the next week. Unfortunately, Hillary was not very good with the keyboard and typed in $200 as the price of the car. Selma noticed that the contract said $200, not $2,000, and was very pleased. She signed it without saying anything. When it was time to make the exchange, Selma gave Hillary $200. In response to Hillary's inquiry regarding an additional $1,800, Selma pulled out the contract and showed her that it said $200. Selma said that there was no mistake on her part because she knew exactly what she was doing and that she thought that Hillary had decided to give her a deal on the car. Which of the following is Hillary's best argument?
That the mistake resulted from an accidental clerical error and that it would be unconscionable to enforce the contract.