Employment and Income questions help please on visit visa

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Hello all,

i am applying for my parents visa and needs your advise on the questions below,

What is the cost to you personally of your trip in GBP(£)?
My answer: none (as i am the sponsor and my parents densest need to spend any money)

The total amount of money you have for this trip?
what money they are referring here, the money my father have in his bank account or the money I as sponsor have reserved for them

The cost of the aeroplane, boat or train tickets
My answer: None for the same reason above

The cost of your accommodation
My answer: None

The cost of your living expenses
again living expenses of my parents in Pakistan or the living expenses while they will have in UK?

Is someone other than you paying for all or a part of your trip?
My answer: Yes
What is the total amount in GBP(£)?
Should i write here £1600 including two tickets and living expenses for two weeks visit. my end balance is around £5500

many thanks for you quick response.

[vam]

I have the similar case ?
My parents won't be spending anything for the trip ?

Please help ?

Regards
Vam