In Pennsylvania, state sales tax is used to pay for services provided by the state. The sales tax rates vary by city and county. In Warren County the sales tax rate is 6%; in Allegheny County, the sales tax rate is 7%; and in Philadelphia the sales tax rate is 8%.

A customer returns a book to a book store in Warren County. The book store has another location in Allegheny County, and the customer shops at both locations. The customer’s receipt shows $1.75 tax was charged on a $24.99 item. Was the item purchased at the Warren County store or the Allegheny County store?
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