Behrouz Fathi-Vajargah - Academic member, Department of Statistics, Faculty of Mathematical Sciences, University of Guilan, Iran,
Sara Ghasemalipour - Ph. D. student, Department of Statistics, Faculty of Mathematical Sciences, University of Guilan, Iran,

In this paper, we study an economic model that is used in department stores . We want to match costs that should be paid in a inventory system for saving the goods and the costs should be paid in queuing system. So, we estimate the long-run expected total cost of this model that the costs are fuzzy variables. Also, we employ the fuzzy simulation method for obtaining the total cost. Finally, some numerical examples is given to illustrate the model by simulation.

Multi-server queuing system, Fuzzy inventory, Fuzzy total cost, Simulation method