What word should be there??

[inthegarden]

I have to complete a sentence with some words that are similar to the ones that i'm given.

For example: there are some evidence (given word: evident)

The problem is that i don't know which words go in this sentence:

The restaurant served diners a meal but charged some .... (Two) as much as others, even though the meals were identical and taken in the same surroundings (Given word: surround)(I am not sure if the last one is also correct)

[Joe]

Not exactly sure what the instructions are but I THINK it might be:

The restaurant served diners a meal but charged some customers twice as much as others, even though the meals were identical and taken in the same surroundings.