Please choose the correct ending to complete the given sentence: Travel: [header] How to pack for a trip to london [title] Read over your airline's luggage restrictions. [step] If you travelling by airline, go to the company's website and look for their baggage guidelines. You will see how many bags they will allow you to take and the exact required dimensions of each bag.

Ending1: You should use your purchase to calculate your purchase price. [substeps] For example, if you're traveling to london especially for the summer, you should spend some time studying those from the bank websites such as the london classifieds website or the society for the london world. Ending2: You can also compare prices at the website for airbags or fly based on the ticket specifics, as well as transit rules. Some airlines also allow you to fly by train. Ending3: [substeps] Of course, the strict rules here are insofar as you play the most popular part, but by research you can make decisions based on what age and supplies you have to pack. [title] Go shopping for basic items ahead of time. Ending4: Pay particular attention to the size of overhead bags and the weight limitations on checked bags. [substeps] Of course, if you exceed the guidelines most airlines will let you take your bag along for an additional fee.

Answer format: ending1/ending2/ending3/ending4