How do you answer a cost question on the new physics GCSE paper?

Question

I've done the mock physics paper and there was a question that you had to prove the cost of something. just generally, how would you answer that? it's on the higher paper.

Answer 1

Looks like GCSE is General Certificate of Secondary Education:

http://en.wikipedia.org/wiki/GCSE

Please give some more details and somebody will answer your question.

Answer 2

Would you be more specific about which GCSE paper, or provide the specific question? Be glad to answer.

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