Abstract: When the demand is random and the retailer is permitted delay in payments,the manufacturer will take some risks of the marketif the retailers sale amount can not pay off the debt.The model of the who lesale price contract has been found within the framework of the new svendor model while the product is short life cycle.Through discussing the model it indicates that the retailer has optimal order quantity to the giving wholesale price if the distribution of the demand is IGFR.The expected profit of the manufacturer is increasing with the who lesale price.The manufacture decides the who lesale price based on the reserved profit of the retailer.The supply chain cooperation can be obtained with certain conditions,but the profit sharing is not flexible.

Key words: delay in payments, wholesale price contract, supply chain cooperation, new svendor model