Hello! I'm trying to have a datacard with a "remaining" amount where it will show the difference between two other data cards as you enter in data, can you please help!

At the moment the form is pulling from a SharePoint List so the value in the "Remaining" data card was previously manually entered, there's no logic tying the two values of Ordered and Received together. I want to get it so if I change the received amount the remaining value will automatically change with it.
Thank you!