Compute the 2020 standard deduction for the following taxpayers. If an amount is zero, enter "0".

a. Ellie is 15 and claimed as a dependent by her parents. She has $1,900 in dividends income and $2,040 in wages from a part-time job. $

b. Ruby and Woody are married and file a joint tax return. Ruby is age 66, and Woody is 69. Their taxable retirement income is $14,835. $

c. Shonda is age 68 and single. She is claimed by her daughter as a dependent. Her earned income is $600, and her interest income is $740. $

d. Frazier, age 36, is married but is filing a separate return. His wife itemizes her deductions.$