|''begin transaction for client''| Joanna |''staff''| Bill |
|''rent''|1||Truck|''for''|1 day|

|''begin transaction for client''| Bob |''staff''| Bill |
|''rent''|1||Tricycle|''for''|1 day|
|''pay with cash $''|20.00|
|''complete transaction''|

|''resume transaction for client''| Joanna |
|''pay with cash $''|2000.00|
|''complete transaction''|

|''rental item subset''|
|''name''|''free count''|
|Truck|0|
|Tricycle|0|