!3 ''Two rentals in separate transactions''
|''begin transaction for client''| Joanna |''staff''| Bill|
|''rent''|2||coffee dispenser|''for''|3 days|
|''pay with cash $''|49.20|
|''complete transaction''|

|''begin transaction for client''| Joanna |''staff''| Bill|
|''rent''|1||hot water dispenser|''for''|3 days|
|''pay with cash $''|24.00|
|''complete transaction''|

 * ''Checks''
|''rentals of client''|Joanna|
|''rental item''|''count''|''start date''|''end date''|
|coffee dispenser|2|2004/05/06 09:01|2004/05/09 09:01|
|hot water dispenser|1|2004/05/06 09:01|2004/05/09 09:01|

|''rental item subset''|
|''name''|''free count''|
|coffee dispenser|8|
|hot water dispenser|11|

