Excel: formulas not updating

Hello,

I have a problem with an Excel file: the formulas are not updating. I change the numbers in the table, but the sum at the bottom doesn't change. When I extend a formula without the $, all the cells take the same value even if the cells involved in the formula change.

What can I do?

I have restarted the file and restarted the computer, but it’s still the same.

Thank you in advance for your help.