{
  "hints": [
    "Mel saved 4 times as much as Zack, so Mel = 4 units and Zack = 1 unit.",
    "4 units = $28, so 1 unit = 28 divided by 4.",
    "Total = Mel + Zack = 28 + (28/4). What is 28 + 7?"
  ]
}