Many retailers in developing countries have difficulty to make direct payment. As a consequence, the vendor has to offer delay in payment to keep sustainable order from his retailers and to attract the retailers to order larger quantity. In the other side, the vendor financial position has to be preserved to keep their financial safety. When time value money is considered, retailers get some additional profit from interest earned and the vendor get loss from interest cost. In this situation, the vendor wants to maximize his profit and financial health.