Sage 100 Contractor: Issue a warning in accounts payable when the cost type does not match the general ledger account

For example, when entering an accounts payable invoice you enter the general ledger account 4100=General Ledger materials acct and on the second page, you enter cost type 1= materials. There should be a warning so if you enter cost type 4(subcontract) instead of 1(materials), you would be aware and could correct it.