3-40 (LO 3-3) A married couple received $10,400 of social security benefits. a. Calculate the taxable amount of those benefits if the couple's provisional income is $23,000. b. Calculate the taxable amount of those benefits if the couple's provisional income is $40,500. c. Calculate the taxable amount of those benefits if the couple's provisional income is $61,000. a. b. C. Taxable amount of benefits