Mr o earned an $89,000 salary, and Mrs. O earned a $40,330 salary. The couple had no other income and can itemize deductions. Use Individual Tax Rate schedules and Standard Deduction Table a. Compute their combined tax if they choose to file separate returns. (Round your intermediate calculations and final answers to the nearest whole dollar amount.) Mr O's Tax Mrs. O's Tax Combined tax b. Compute their tax if they file a joint return. (Round your intermediate calculations and final answerto the nearest whole dollar amount.) ncome tax