def METHOD_NAME(self, value):
    price_diff_product = self._l10n_ro_get_or_create_price_difference_product()
    stock_journal_id = self.product_id.categ_id.property_stock_journal or False
    return dict(
        account_journal_id=stock_journal_id and stock_journal_id.id,
        l10n_ro_cost_type="price_diff",
        cost_lines=[
            (
                0,
                0,
                {
                    "name": "Price Difference: equal split",
                    "split_method": "by_quantity",
                    "price_unit": value,
                    "product_id": price_diff_product.id,
                    "account_id": self.account_id.id,
                },
            )
        ],
    )