There are a couple of different price points for Excel and Microsoft Office 365. You can also access the web-based version of Microsoft Excel for free if you do not need to have the program installed on your computer.
Office 365 Personal: $6.99/month or $69.99/year
Office 365 Home: $9.99/month or $99.99/year
Office Home & Student 2019: $149.99 one-time
Office 365 Business: $8.25/user/month (annual commitment required)
Office 365 Business Premium: $12.50/user/month (annual commitment required)
Office 365 Business Essentials: $5/month (annual commitment required)