a sample stock inventory that goes with https://gist.github.com/criesbeck/0039c807800cee062af5c806e10d1347

inventory.json

{
  "12064273040195392": {
    "S": 0,
    "M": 3,
    "L": 1,
    "XL": 2
  },
  "51498472915966370": {
    "S": 0,
    "M": 2,
    "L": 3,
    "XL": 2
  },
  "10686354557628304": {
    "S": 1,
    "M": 2,
    "L": 2,
    "XL": 1
  },
  "11033926921508488": {
    "S": 3,
    "M": 2,
    "L": 0,
    "XL": 1
  },
  "39876704341265610": {
    "S": 2,
    "M": 0,
    "L": 0,
    "XL": 0
  },
  "10412368723880252": {
    "S": 3,
    "M": 2,
    "L": 2,
    "XL": 2
  },
  "8552515751438644": {
    "S": 2,
    "M": 0,
    "L": 0,
    "XL": 2
  },
  "18644119330491310": {
    "S": 3,
    "M": 3,
    "L": 2,
    "XL": 0
  },
  "11854078013954528": {
    "S": 1,
    "M": 1,
    "L": 1,
    "XL": 0
  },
  "876661122392077": {
    "S": 3,
    "M": 1,
    "L": 0,
    "XL": 1
  },
  "9197907543445676": {
    "S": 3,
    "M": 3,
    "L": 1,
    "XL": 2
  },
  "10547961582846888": {
    "S": 2,
    "M": 2,
    "L": 0,
    "XL": 0
  },
  "6090484789343891": {
    "S": 2,
    "M": 0,
    "L": 2,
    "XL": 3
  },
  "18532669286405344": {
    "S": 2,
    "M": 3,
    "L": 0,
    "XL": 2
  },
  "5619496040738316": {
    "S": 1,
    "M": 3,
    "L": 3,
    "XL": 2
  },
  "11600983276356164": {
    "S": 3,
    "M": 3,
    "L": 3,
    "XL": 1
  },
  "27250082398145996": {
    "S": 1,
    "M": 0,
    "L": 0,
    "XL": 2
  }
}