Milatog is a Russian company producing cattle forage. In the province of Domedovsky, there are seven farms which have an average daily forage demand $($in quintals$)$ equal to $36,42,34,50,27,30$ and $43,$ respectively. Milatog intends to purchase some silos, to supply the seven farms. Six different potential sites in the area have been identified, with a maximum daily forage throughput $($expressed in quintals$)$ equal to$,$ respectively, $80,90,110,120,100$ and $120.$ For the next four years, Milatog has estimated the following fixed costs $($in e$)$: $321420,350640,379860,401775,350640$ and $336030,$ respectively. The daily average marginal facility cost $($in e$)$ per quintal of forage, for each potential site, is equal to $0\mathrm{.}15,0\mathrm{.}18,0\mathrm{.}20,0\mathrm{.}18,0\mathrm{.}15$ and $0\mathrm{.}17,$ respectively. The transport cost per quintal of forage and per kilometer traveled is equal to e $0\mathrm{.}06.$ The distances for each origin$-$destination pair are shown in Table $3.$ The daily transport costs are computed by considering that every journey is made up of both an outward and a return journey. Milatog is planning to keep the warehouses in operation for four years $($corresponding to $3653+366=1461$ days$).$