Public administration has a budgetary responsibility ruled by a legislation which establishes transparency in the adequacy of public resources. Guided by these laws, the public budget is composed of the multi-year plan, budgetary guidelines and annual budgets, which guarantee the estimate of revenue to be applied in each financial year. It is essential that the acquisition planning and the system structure consider the moment of budget restriction through the regulations mentioned above and also the Fiscal Responsibility Law, which establishes the expenditure ceiling and the nature to be complied with in the application of the values. Action 21A0 for the Reimbursable Uniform System is considered an investment, therefore a discretionary expense, tending to reduce the receipt of funds in subsequent years, making studies of great value whose objective is to reduce expenses for monitoring the national scenario. In this regard, this dissertation in a first analysis intends to present a methodology through a p median mathematical model, which indicates the best destination to be sent the e-commerce merchandise, considering the user s origin, applying for this, the minimization of the freight cost and the fixed cost of the Reimbursable Uniform Sale Points. In a second sensitivity analysis, the model is run in order to present the operating cost of the stores based on their closure, and then show the ideal number of PRVF that must be kept open for the Air Force to reach the minimum cost of operation .