query GetItemPriceDetails($itemIds: [ID]!, $customerId: ID!, $currencyFactor: Decimal!) {
  GetItemPriceDetails(itemIds: $itemIds, customerId: $customerId, currencyFactor: $currencyFactor) {
    itemId
    defaultSalesPriceNet
    latestSalesPriceNet
    customersLatestSalesPriceNet
    purchasePriceNet
    latestPurchasePriceNet
  }
}

{
  "itemIds": [
    "id"
  ],
  "customerId": "id",
  "currencyFactor": "value"
}

{
  "data": {
    "GetItemPriceDetails": [
      {
        "itemId": "id",
        "defaultSalesPriceNet": "value",
        "latestSalesPriceNet": "value",
        "customersLatestSalesPriceNet": "value",
        "purchasePriceNet": "value",
        "latestPurchasePriceNet": "value"
      }
    ]
  }
}