Cost Estimate using Commercial Price 3 of BOM item

Dear Experts,

I am trying to create a cost estimate for certain materials using ABC costing variant. The objective is that the cost estimate should pick up Commercial price 3 from the material masters of the BOM item and then calculate cost estimate for the main product (The costing variant has been customized this way). However, for certain main products, the system is picking up the standard price of the BOM item and in some main products it it correctly picking up the Commercial price.

The BOM items used in the different products are different.

I am unable to understand this behaviour. If anyone has come across any such problem before, please help.

Regards,

Aditya