Please choose the correct ending to complete the given sentence: Cars & Other Vehicles: [header] How to tip a cab driver [title] Listen for the fare. [step] When the trip is over, the driver will tell you how much you owe. Calculate the tip as a percentage of this fare, or " eyeball " the amount by rounding up to the nearest $5 or $10 bill increment.

Ending1: [substeps] Most cabs feature a fare ticker which allows you to watch the price of the ride rise as you approach your destination. If you're in a hurry, you can use this to predict, calculate, and prepare your tip before it's time to get out of the cab. Ending2: The driver may be willing to itemize the amount you receive with a piece of paper. [substeps] Ask the cab driver to do something quick to get you a small piece of paper. Ending3: It's good to tally the tips regularly, though, so that you're not left with any surprises. [title] Bid for a cab at the end of the trip. Ending4: If possible, offer to pay this additional amount or minimum fare in advance to avoid late fees. [substeps] If you pay early, note whether you want to end the trip at all or how often.

Answer format: ending1/ending2/ending3/ending4