33. Leni Lou, an unmarried taxpayer with no dependents, had $65,000 of AGI, less than $12,000 itemized deductions, and prepaid $7,000 of her federal tax liability via payroll withholdings. How much refund or amount due? a. $600 due b. $3,240 due c. $1,632 refund d. $0 (no refund or amount due)