@aishwaryamj that sounds more like an issue with your NetSuite config or the mappings. Here are a couple posts that may help you troubleshoot:
- https://stackoverflow.com/questions/71495177/could-not-calculate-cost-for-the-selected-realtime-rate
- https://www.reddit.com/r/Netsuite/comments/5wo3l1/could_not_calculate_cost_for_the_selected/
You can map the "use dynamic mode" and mimic entering as if you were in the UI. See articles here: