Sophia Johnson is 24 years old and single, lives in an apartment, and has no dependents. Last year she earned $44,600 as a sales assistant for Office Furniture Rentals, $3,568 of her wages were withheld for federal income taxes. In addition, she had interest income of $177. The standard deduction in 2014 was $6,200 for single. The exemption was claimed to be worth $3,950. Calculate her tax liability. Round the answer to the nearest cent. Use unrounded values in later calculations.