Problem: Tasha operates a business consulting firm. She contracts with Raleigh to provide business consulting services for his new company for a period of six weeks. Tasha and Raleigh sign a written agreement. Assume that it is a completely integrated agreement. After signing the agreement and working on Raleigh's project for three days, Tasha asks Raleigh if he would be willing to extend the time for her to work on the project to seven weeks to give Tasha some additional time to accumulate data for the project. Raleigh verbally agrees that it would be good to have more data and agrees to extend the time for performance to seven weeks. At the end of the six-week period, Tasha has not completed her work, and Raleigh refuses to pay. If Raleigh argues that the verbal agreement is inadmissible evidence under the parole evidence rule, will his argument be successful? Fully explain your answer, including any rule or rules that support it.