Use the Software for commercial purpose?

I wonder, if it is possible to use your software for commercial purpose as long as I don't offer the free license as paid. Let me explain, my intention is, due to the high potential of your application, to offer the installation of your program on the devices of my clients charging them only for the installation, configuration and maintenance service of the pos system, without charging them for the use of your application. , or by your license. Thank you so much