Given a travel related situation, and given a specific question about the situation, summarize the question into a title

[EX Q]: I am travelling to Budapest from India for a week.

Which SIM card should I get ?

What is the process for getting a sim card for a traveler and where can I find it ?

[EX A]: Which SIM card to use in Budapest?

[EX Q]: I noticed that my flight going east to west took almost an hour longer than when coming back from west to east in continental US. What is the reason for this?

[EX A]: Why is a flight going west longer than the same flight going west to east?

[EX Q]: Upon visa-less immigration to Cost Rica, I would have to prove sufficient funds of $100 per month of residence (Source)

Since I don't expect them to have a dollar-giving ATM before immigration control at San Jose airport and my local currency is Euro, I wondered how I can prove that.

Euros are not accepted in Costa Rica I'd guess. Banks in my area could give me a $100 bill (but none of them could provide Colones yet), but does the next taxi driver have sufficient change to accept it? Or will immigration control accept any bank account report showing I have more than 100 Euro on it?

[EX A]:
Visiting Costa Rica: How to prove sufficient funds?