Cost Codes

SUGGESTED

I have 3nr items on a purchase order from 1 Company. Obviously I can select a different "Product Code" for each line that is entered but I cannot have a different "Cost Code" for each item. for example;

Line 1; SW100 - 50mm x 50mm softwood.

Line 2; HW100 - 200mm x 50mm hardwood.

I can have / create "Cost Code" 3000 Softwood and 3500 Hardwood but they cannot be mixed on the same Purchase order.

My vision was to have "Cost Code" 3000 Softwood and then to drill down to SW100, SW200, SW300 and so on. 

Am I missing something? 

Can the "Cost Codes" be mixed as well as the product codes?

Regards,

Paul.