Very simple problem, help me haha

I’m overthinking this here. WTF am I doing?

Create a loop to return an object that has the candy name as the key and the cost as the value

function loopingData2() {
  let obj = {}

  for (let key in store4) {
    obj[store4][key] = key
  }

  return obj
}
var store4 = {
    'Dark Chocolate Crunchies': {
        'cost': 4.34,
        'sold on': ['2015-01-06', '2015-01-06', '2015-01-07', '2015-01-08', '2015-01-08']
    },
    'Mint Wafers': {
        'cost': 1.14,
        'sold on': ['2015-01-06', '2015-01-07', '2015-01-07', '2015-01-07', '2015-01-07', '2015-01-07', '2015-01-09', '2015-01-09', '2015-01-09', '2015-01-09']
    },
    'Peppermint Poppers': {
        'cost': 2.43,
        'sold on': ['2015-01-07', '2015-01-07', '2015-01-08', '2015-01-08', '2015-01-08', '2015-01-09', '2015-01-10', '2015-01-10']
    },
    'Peanut Butter Buttered Peanuts': {
        'cost': 1.84,
        'sold on': ['2015-01-06', '2015-01-06', '2015-01-08']
    },
    'Berry Bites': {
        'cost': 7.94,
        'sold on': ['2015-01-06', '2015-01-06', '2015-01-06', '2015-01-07', '2015-01-07', '2015-01-07', '2015-01-07', '2015-01-08', '2015-01-09', '2015-01-09', '2015-01-09', '2015-01-09', '2015-01-10', '2015-01-10', '2015-01-10', '2015-01-10']
    },
    'Caramel Twists': {
        'cost': .55,
        'sold on': ['2015-01-07', '2015-01-08', '2015-01-08', '2015-01-08', '2015-01-09', '2015-01-10']
    },
    'Banana Bunches': {
        'cost': 4.58,
        'sold on': ['2015-01-06', '2015-01-06', '2015-01-07', '2015-01-10']
    }
};

Thank you…it was 11 hours of coding today. My brain is liquid.