Fusion table that stores a join of customers and the items they purchase

Hi All,

We are trying to assign GL Codes to the AR Invoice report for a customer. The GL codes are specific to the item and customer combination. I would like to find out if there is a table that stores relationship between customers and items so a flex field can be added to store the GL code for the customer-item combination. I would prefer not to use transactional tables such as those that store invoice lines or sales order lines.

Thank you

Shailesh