April 1, 2020 - Employer in e-mail: "Will pay you $100,000 for 18 months of employment to begin in three months."April 2, 2020 - Employee response by telephone: "…I will accept if the company pays for a year of my MBA from the W. P. Carey School of Business…"April 3, 2020 - Employer response by e-mail: "If you want us to pay for a year of your MBA, then we will pay you $90,000."April 4, 2020 - Employee response by e-mail, "OK. $90,000 and a year of my MBA."How would you describe the conversation above between the parties?