Computation of Tax. The following information relates to two married couples: Salary (earned by one spouse) $32,000 $115,000 Interest income 1,000 7,000 Deductible IRA contribution 5,000 0 Itemized deductions 15,000 15,000 Exemptions 6,800 6,800 Withholding 700 18,700 Compute the 2007 tax due or refund due for each couple. Assume that the itemized deductions have been reduced by the applicable floors.