We can exhibit the effects of adding much more of a variable source, say labor, to a set number of funds and find out what occurs to output. For demonstration needs in economics, we often make widgets, which is https://www.youtube.com/watch?v=-nQTR6bXhfU&list=PLZ3DkIWtVYetfvXsAvY04--yisQJg2WWI&index=9&pp=iAQB