Compute the 2015 standard deduction for the following taxpayers. If an amount is zero, enter "0".

Ruby and Woody are married and file a joint tax return. Ruby is age 66 and Woody is 69. Their taxable retirement income is $10,000.	$
c.	Shonda is age 68 and single. She is claimed by her daughter as a dependent. Her earned income is $500 and her interest income is $125.