Tanya spilled a cookies 'n cream latte on her computer two days before her term paper was due. She was in desperate need of a new laptop, so she went online and found a laptop that fit her needs. She emailed the seller, Mallory, expressing her desire to purchase the laptop. Mallory emailed Tanya back and said that she would sell her laptop to Tanya for $250. Tanya and Mallory signed the following agreement: "I, Mallory Lu, agree to sell my laptop computer to Tanya Chalk for Three Hundred Dollars and zero cents. This is the entirety of the agreement. This agreement supersedes any and all other agreements made by the seller and the buyer." Tanya now claims that she should only pay $250 for the laptop because during one of her email exchanges with Mallory, Mallory told her that $250 was the price of the laptop, and she has the email exchange as evidence of the price quote of $250. What legal concept could be used to enforce the contract for $300? Condition Precedent Privity of Contract Vesting Statute of Frauds The Parol Evidence Rule