If business as a discipline is to develop away from extractive practices we need to develop a mathematical language to help economists and policy makers model alternative approaches. Modelling – using both standard business calculations and simulation tools like those developed by Steve Keen – can help decision making at the level of the individual firm and policy level. We propose that adaptations of the Cobb-Douglas Equation can be used to help those doing macro-economic modelling of the sustainable economy. We hope this article contributes to knowledge.