Dolibarr Cost Calculation Fix

I'm working with Dolibarr version 15. I'm creating a manufacturing order that involves disassembling a product from raw materials to obtain another product. Currently, the system shows the cost of the obtained product as zero, despite having the purchase price of the raw materials recorded.

I need assistance to ensure that Dolibarr accurately calculates and displays the cost of the final product.

Ideal skills:
- Proficiency with Dolibarr, especially version 15
- Strong understanding of manufacturing order processes
- Experience in troubleshooting and configuring cost calculation issues in ERP systems