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:
I am traveling from the United States to the UK in a few days, and I will have a checked suitcase. My layover is in Frankfurt, Germany. Since my final stop is in the UK. Will I go through customs in Frankfurt or in the UK? Also, the two legs of my trip will be with the same airline.


Ex Output:
On a trip from US to UK with a layover in Germany, at which point of my journey will I go through customs?


Ex Input:
I have a flight with one leg operated by Air France and the other one by JAL. Apparently, I cannot choose my seat from the Air France website and cannot check-in online on the JAL website. Is there any way for me to choose my seat?

Also, I will Premium Economy on JAL, are all seat of equivalent quality like in Business or is there bigger differences between seats like in Economy?


Ex Output:

How to choose seat with JAL when online check-in is not available?