One of the first models for short-term financing decisions was constructed by A. A. Robicheck, D. Teichroew, and J. M. Jones. Their approach was to use a first order autoregressive process for generating monthly sales. The sales process in conjunction with various ordering rules, credit terms, etc., drives the accounting model of the firm. Various strategies for short term financing (mixes of installment financing, commercial paper and bank borrowing) are implemented, and the distribution of financing costs is tabulated for the various strategies.