What is the problem addressed in this paper? What are the benefits and drawbacks of warehouses consolidation in a distribution network? Briefly, in a few sentences (avoid symbols and equations as much as possible), describe the mathematical model developed in this paper. In particular, what is the objective, and what are the sets, decision variables, and types of constraints in the model? What type of optimization model and what algorithm/software were used to solve it? What was the size of the problem (you can also look at the excel data file which is in that same folder)?