Fetch details of service charge(s) payable for this application

Example response

{
  "id": "MyProduct",
  "description": "My product fee",
  "etag": "d8a936fc59fd43ba6c66363c25684be1964ea03d",
  "items": [
    {
      "amount": "100",
      "available_payment_methods": [
        "credit-card"
      ],
      "class_of_payment": [
        "data-maintenance"
      ],
      "description": "My Item",
      "description_identifier": "MY_ITEM_CODE",
      "kind": "cost#cost"
    }
  ],
  "kind": "MyItem",
  "links": {
    "resource": "http://localhost:4000/submission/eb4668886a6db281",
    "self": "http://localhost:4000/submission/eb4668886a6db281/payment"
  },
  "status": "Pending",
  "company_number": "SL009355"
}