Robert and John are married and have 3 dependent children and earn a gross biweekly salary of $6,763. They will also make the following tax-deductible purchases: - Medical expenses: $6,947 - Educational expenses: $6,479 When they file their taxes jointly, what will their tax refund be? Use the following information: - Standard deduction for married couples: $25,100 - Biweekly allowance: $165.38 per person