In this sub-section, we formulate the operational cost optimization model, where the carbon emissions resulting from the transportation and freezers’ storage activities are not accounted for. As such, this model falls under the rich category of classical multistage inventory models that have cost minimization as their primary objective with no consideration for environmental concerns. We also develop a solution procedure to generate the optimal values for the problem decision variables.Given that the first batch will be shipped to the retailer as soon as the lot size of Q units, where Q ? kq, is received in the distribution center, then the number of freezer units to be turned on at the beginning of the cycle is the integer n1 satisfying