This paper tries to incorporate all Huang and Chung [4], Chung and Huan'g [2] and Teng [71 to develop the retailer]s inventory model, That is, we want to investigate the retailer's eptimal repleni$hment policy with noninstantaneous receipt under trade credlt, cash discount and the retailer's unit selling price is not lower than the unit purchasing price. Mathematical models have been derived for obtaining the optimal eycle time for item so that the annual total relevant cost is minimized. One

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... sy-to-use theorem is deve]oped to eMeiently determine the optimal cycle time for the retailer. Some previously published Tesults of other researchers are deduced as special cases. Flirthermore, numerical examples are given to illustrate the results and managerial insights are drawn.