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

Ex Input:
The official UK document says:

You can bring in other goods worth up to 390 (or up to 270 if you arrive by private plane or boat).

If a single item's worth more than your allowance you pay any duty or tax on its full value, not just the value above the allowance.

The question:

Is the tax-free allowance applicable per an individual item or per total cost of all items combined in a baggage?

If you need a more detailed example, here it is.

I am relocating to the UK and going to take my desktop computer with me. I want to disassemble it and put small parts into my backpack and big parts into a suitcase that will be put into aeroplane's luggage. All these parts will be with me upon my arrival to the UK.

As for the computer. I bought all its components separately in my country and put them all together and used the computer for around a year. Almost all the parts in the desktop were cheaper than the tax-free allowance except the Video Card.

What will I be charged for? For the sum of all the components prices or only for the video card?

Ex Output:
Is the tax-free allowance applicable per item or per total cost of all items combined in a baggage

Ex Input:
5 months ago, I flew from Moscow to London with a connection in Amsterdam. My flight was late by nearly 3 hours and my connection was missed. I was put into a hotel overnight and flew the next day. At that time no compensation was offered from the airline. The journey was booked with lastminute.com It was with KLM and the delay was the airlines fault.

A few days ago I received a legitimately-looking email saying that passengers could be entitled to compensation. The email:

From: "lastminute.com"

Hi [MY NAME],

Get compensation for your flight delay!

At lastminute.com, we want our customers to have the best travel experience possible, That's why we were sorry to see that your flight
from Moscow to Amsterdam on 25 February, 2019 may have been delayed.

Under EU Regulation (EC) No. 261/2004, introduced to protect European passengers against lengthy delays and other travel
disruptions, you could be entitled to as much as 400 in compensation.

You can either submit your claim directly to the airline, or get assistance from an external organization such as our partner AirHelp.
AirHelp are the travel experts, making the process of gaining
compensation for delayed, cancelled and overbooked flights simple and
stress-free.

AirHelp doesn't charge any service fees unless your claim is successful. Before using AirHelp's service, we advise that you check
the company's terms, conditions and fees on their website
www.airhelp.com.

[LINK TO CLAIM]

Is it a bit suspicious I was contacthed 5 months after the flight and is there a point making a claim 5 months after the delay?

Ex Output:
Email about missed connecting flight compensation 5 months after flight, is there a point?

Ex Input:
My wife and I are going to Las Vegas on a business trip for 5 days. While we're there, we want to be able to keep in touch with mobile phones, and I'd like to spend about $10-20 per phone (including prepaid credit).

This is possible in the UK, where one can buy a Pay As You Go phone for less than 5 and a SIM Card with 10 credit on it. Sometimes you can get them bundled together for 10. That's the kind of price range I'm looking at.

A while ago when I went to Wyoming, a friend advised me to buy a prepaid Tracfone, but that worked out to cost more than $50.

What's the trick to getting cheap temporary phones in the USA?

Ex Output:
How can I buy a pair of cheap phones in the USA