{
  "_comments": [
  "simple instance demonstrating a sortation center problem",
  "it features 3 fulfillment centers, 3 sortation centers and 5 customers"
  ],
  "fulfillment_centers": [
    {
      "name": "Vienna",
      "supply": 30
    },
    {
      "name": "Munich",
      "supply": 40
    },
    {
      "name": "Zurich",
      "supply": 15
    }
  ],
  "customers": [
    {
      "name": "Sue",
      "demand": 12
    },
    {
      "name": "Chris",
      "demand": 15
    },
    {
      "name": "Pat",
      "demand": 10
    },
    {
      "name": "George",
      "demand": 8
    },
    {
      "name": "Peppa",
      "demand": 12
    }
  ],
  "sortation_centers": [
    {
      "name": "Austria",
      "unit_cost": [
        {
          "from": "Vienna",
          "cost": 3
        },
        {
          "from": "Zurich",
          "cost": 5
        },
        {
          "from": "Munich",
          "cost": 2
        }
      ],
      "shipping_cost": [
        {
          "to": "Sue",
          "cost": 20
        },
        {
          "to": "Chris",
          "cost": 20
        },
        {
          "to": "Pat",
          "cost": 50
        },
        {
          "to": "George",
          "cost": 40
        },
        {
          "to": "Peppa",
          "cost": 40
        }
      ]
    },
    {
      "name": "Germany",
      "unit_cost": [
        {
          "from": "Vienna",
          "cost": 3
        },
        {
          "from": "Zurich",
          "cost": 4
        },
        {
          "from": "Munich",
          "cost": 1
        }
      ],
      "shipping_cost": [
        {
          "to": "Sue",
          "cost": 30
        },
        {
          "to": "Chris",
          "cost": 30
        },
        {
          "to": "Pat",
          "cost": 40
        },
        {
          "to": "George",
          "cost": 20
        },
        {
          "to": "Peppa",
          "cost": 20
        }
      ]
    },
    {
      "name": "Switzerland",
      "unit_cost": [
        {
          "from": "Vienna",
          "cost": 4
        },
        {
          "from": "Zurich",
          "cost": 3
        },
        {
          "from": "Munich",
          "cost": 4
        }
      ],
      "shipping_cost": [
        {
          "to": "Sue",
          "cost": 40
        },
        {
          "to": "Chris",
          "cost": 40
        },
        {
          "to": "Pat",
          "cost": 30
        },
        {
          "to": "George",
          "cost": 40
        },
        {
          "to": "Peppa",
          "cost": 40
        }
      ]
    }
  ]
}