array_of_arrays.json

[
  ["Days", "Orders", "Items ", "AOV", "Average Item/Order"],
  ["14-Dec-13", 45, 90, 45, 2],
  ["15-Dec-13", 15, 40, 23, 2.5]
]

array_of_objects.json

[
  {
    "Days": "14-Dec-13",
    "Orders": 45,
    "Items": 90,
    "AOV": 45.00,
    "Average Item/Order": 2
  },
  {
    "Days": "15-Dec-13",
    "Orders": 15,
    "Items": 40,
    "AOV": 23.00,
    "Average Item/Order": 2.5
  }
]