Possible Clues:

• With this one might count on getting a hundred into an omnibus
• Gadget you can count on?
• Chinese calculator
• A maximum possible speed in a vehicle? You can count on it
• A coach keeps bill for calculator
• Grab a customer holding calculator
• A public vehicle can accommodate a hundred -- you can count on that
• You may count on getting a taxi up here with you and me
• So you may count on getting a taxi up with us
• So you may count on getting a taxi back with us