2. onentatements of inventory and b. understatement of inventory at c. overstatements of inventory and payables in t information on the inventory subsidiary ledger the inventory subsidiary ledger keys for the Service Ticket table are. For presentation purposes I have left out the diamonds. frimeign keys). e. Customer ID, Mech, Mech IDanic ID 2. onentatements of inventory and b. understatement of inventory at c. overstatements of inventory and payables in t information on the inventory subsidiary ledger the inventory subsidiary ledger keys for the Service Ticket table are. For presentation purposes I have left out the diamonds. frimeign keys). e. Customer ID, Mech, Mech IDanic ID