David and Ruby are engaged and plan to get married. During 2020, David is a full-time student and earns $9,400 from a part-time job. With this income, student loans, savings, and nontaxable scholarships, he is self-supporting. For the year, Ruby is employed and has wages of $79,200. Click here to access the standard deduction table to use. Click here to access the Tax Rate Schedules. If an amount is zero, enter, "0". Do not round your intermediate computations. Round your final answer to nearest whole dollar. a. Compute the following: David Filing Single Ruby Filing Single Gross income and AGI $ Standard deduction Taxable income $ Income tax b. Assume that David and Ruby get married in 2020 and file a joint return. What is their taxable income and income tax? Round your final answer to nearest whole dollar. Married Filing Jointly Gross income and AGI $ Standard deduction Taxable income Income tax C. How much income tax can David and Ruby save if they get married in 2020 and file a joint return? of the amount over ...... 10% $ 0 2020 Tax Rate Schedules Single-Schedule X Head of householdSchedule Z If taxable of the If taxable income is: But not amount income is: But not Over- over- The tax is: over- Over- over- The tax is: $ 0 $ 9,875 ..10% $ 0 $ 0 $ 14,100 9,875 40,125 $ 987.50 + 12% 9,875 14,100 53,700 $ 1,410.00 + 12% 40,125 85,525 4,617.50 + 22% 40,125 53,700 85,500 6,162.00 + 22% 85,525 163,300 14,605.50 + 24% 85,525 85,500 163,300 13,158.00 + 24% 163,300 207,350 33,271.50 + 32% 163,300 163,300 207,350 31,830.00 + 32% 207,350 518,400 47,367.50 + 35% 207,350 207,350 518,400 45,926.00 + 35% 518,400 156,235.00 + 37% 518,400 518,400 154,793.50 + 37% Married filing jointly or Qualifying widow(er) Married filing separatelySchedule Y-2 Schedule Y-1 If taxable of the If taxable income is: But not amount income is: But not Over- over The tax is: over Over- over- The tax is: $ 0 $ 19,750 ........ 10% $ 0 $ 0 $ 9,875 ......... 10% 19,750 80,250 $ 1,975.00 + 12% 19,750 9,875 40,125 $ 987.50 + 12% 80,250 171,050 9,235.00 + 22% 80,250 40,125 85,525 4,617.50 + 22% 171,050 326,600 29,211.00 + 24% 171,050 85,525 163,300 14,605.50 + 24% 326,600 414,700 66,543.00 + 32% 326,600 163,300 207,350 33,271.50 + 32% 414,700 622,050 94,735.00 + 35% 414,700 207,350 311,025 47,367.50 + 35% 622,050 167,307.50 + 37% 622,050 311,025 83,653.75 + 37% 14,100 53,700 85,500 163,300 207,350 518,400 of the amount over- $ 0 9,875 40,125 85,525 163,300 207,350 311,025 Exhibit 3.4 Basic Standard Deduction Amounts Filing Status 2019 2020 Single $12,200 $12,400 Married, filing jointly 24,400 24,800 Surviving spouse 24,400 24,800 Head of household 18,350 18,650 Married, filing separately 12,200 12,400