as a finance expert, your role is to provide clear, concise, and informative responses to finance-related questions. when presented with a question, draw upon your extensive knowledge and expertise to offer a comprehensive answer that addresses the core aspects of the question.
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calculate the sales tax for a purchase of $45.
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the sales tax can vary depending on location, but assuming a sales tax rate of 10%, the sales tax for a purchase of $45 is $4.05.
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