A mathematical extension to the Austrian School of Economics is introduced where a treatment of individual action is extended to a macroeconomic description. Useful equations are derived including the probability of an individual to act, the price for a good or service that an individual is willing to pay, methodology for satisfactorily predicting the market price for a good, among others. Further, the three ways of influencing action are explored including in the context of government intervention into individual action. Interest rates are briefly discussed with respect to money supply and time preference. As well, marginal utility is concisely mentioned in terms of the presented model.