**mamoros**Hello Support - I've inserted a matrix into my form, and I want to perform calculations in some columns of the matrix and calculate totals in the bottom row. When I use the Form Calculation widget, my matrix fields do NOT show up! Please see screen shot below.

Please help!

- JotForm Support
**BDAVID**Looks like you haven't performed any calculation, the wizard is empty:

Please check this guide that shows how to do it: https://www.jotform.com/help/343-How-to-Perform-Form-Calculation-in-the-Matrix-Field

Let us know if you need more help.

- JotForm Support
**BDAVID**Just to let you know, you need to scroll down, and select the matrix field, you can show the headers if you want to:

Let us know if you need more help.