How to integrate with Costing module to get standard cost of an item in SO?

We have a business case that for internal orders we have to sell the items at standard cost without any markup profits/margins. To achieve this we are planning to implement 'Cost Based list price' by integrating Order Management (Pricing) with Costing module to fetch the standard cost at the time of sales order creation. We followed the Oracle notes (https://docs.oracle.com/en/cloud/saas/supply-chain-and-manufacturing/25a/faupr/get-costs-for-pricing-from-external-systems.html#s20059245) and modified Get Base List Price for Goods and Services & Get Price from External Systems Custom but still stuck with Pricing algorithm error at the time of order entry.. Oracle SR is open for months and there is no much progress on that side.