If Excel formulas are not working, updating, or calculating, you need to execute the solutions mentioned in this post. You should start with the first solution and then move your way down.

In Excel 2010, 2011, and 2013, make sure the solving method is set to Simplex LP. Simplex LP is appropriate for this problem, because this problem is linear (the “L” in LP stands for linear).

The Solver add-in is included by default in Microsoft Excel. You only need to activate it to load it. Learn how to load Solver add-in in Excel if it is not showing.

Discover 13 essential Excel fixes to solve formula errors, formatting glitches, ... With the right techniques, you can turn Excel’s quirks into opportunities to work smarter, not harder.

Learn which Excel formulas perform best for large datasets and how to ... If you’ve ever wondered how to make Excel work smarter (not ... How to Solve the Array of Arrays Problem in Excel’s ...