These seem the right choices to me: a) How much do you charge per hour? b) What's your hourly fee? The conversation as a whole is a bit odd, as the earlier question 'What's your expectation/" (which is not particularly native) is the same question as a and b.
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Mister MicawberThe conversation as a whole is a bit odd, as the earlier question 'What's your expectation/" (which is not particularly native) is the same question as a and b.Thank you MM.