def METHOD_NAME(self, pickings):
    result = super().METHOD_NAME(pickings)
    if self.invoice_policy == "pricelist":
        # force computation from pricelist when the invoicing policy says
        # so
        rates = self.pricelist_send_shipping(pickings)
        for index, rate in enumerate(rates):
            result[index]["exact_price"] = rate["exact_price"]
    return result