Sales Invoice Data Structure

{
    "doctype":"Sales Invoice",
    "customer":"KHACH_LE",
    "posting_date":"2026-05-19",
    "due_date":"2026-05-19",
    "po_no":"Billing #4086",
    "items":[
        {
            "item_code":"total_storage_fee",
            "item_name":"total_storage_fee",
            "qty":1,
            "price":410573,
            "amount":410573
        },
        {
            "item_code":"total_fulfillment_fee",
            "item_name":"total_fulfillment_fee",
            "qty":1,
            "price":81216,
            "amount":81216
        },
        {
            "item_code":"total_inbound_fee",
            "item_name":"total_inbound_fee",
            "qty":1,
            "price":1080,
            "amount":1080
        }
    ]
}