How to link Account Receivables (AR) module with Costing to get item cost for an invoice line

Summary:

Hello

Which table should I use/link with 'RA_CUSTOMER_TRX_LINES_ALL' to get the cost price of an invoice line in AR?

Content (please ensure you mask any confidential information):

I am working on a BI project whereby I need to calculate gross profit (Sales Amount - Cost Amount).

For example: I have a manual transaction on Oracle Fusion.

I can obtain the total sales value from 'RA_CUSTOMER_TRX_LINES_ALL' table. Now I need to find the total cost for that particular invoice line.

Which table should I use/link with 'RA_CUSTOMER_TRX_LINES_ALL' to get the total cost price for that particular invoice line?