- JotForm Support
**Welvin**It's not possible, but we have this configurable list widget. Please check this guide: http://www.jotform.com/help/282-How-to-Set-Up-the-Configurable-List-Widget.

**felmiranda**How can i do it like this one?: https://shots.jotform.com/welvin/pages/tony.html

- JotForm Support
**Welvin**That would require you to get the form source codes and modify elements such as the Class and Type of the matrix. Why use this if you can do it in the configurable list widget? If you really wish to use the matrix, let me know and I'll give you the steps to have it.

**felmiranda**Because i need to make calculations within the matrix. I need to know how many items are marked with ok. What would be the best solution?. Please give me the steps to get this solution, this is the form im creating:

https://form.jotform.com/52954442781967

Thanks a lot,

**felmiranda**Hi Welvin,

Can i do calculations using configurable matrix?

Best,

- JotForm Support
**Kevin_G**Unfortunately, as my colleague said some comments above, this is not possible to do with the Matrix Field, and as you say the Configurable List widget can not be used with the Form Calculations widget.

If you want to do it you will need to get the source code of your form and customize the Matrix field to add the drop downs as you want and then add some Javascript code to calculate the total.

This guide will help you to get the source code: http://www.jotform.com/help/104-How-to-get-the-Full-Source-Code-of-your-Form.

**felmiranda**Thanks