Using 2018 tax law, answer these questions about the following scenario. Numbers in parentheses indicate age. Each taxpayer has only the income stated. Unless otherwise stated, each prospective dependent is an unmarried U.S. citizen who does not provide more than half of their own support. In no case will more than one taxpayer attempt to claim the same qualifying child as a dependent. No one other than the persons listed live in the home. Karla (25) is unmarried and was a full-time student from January through June. Karla worked part-time but did not provide more than 50% support for herself or her son, Sam (1). Karla and Sam lived with Karla's parents, Ron (48) and Sue (47), the entire year. Karla's wages were $7,204. Ron's wages were $52,013; Sue's wages were $38,750; Sam's income was $350. Karla will allow her parents to claim Sam this year. Karla, Sam, Ron, and Sue had health care coverage all year through Ron's employer. Ron and Sue are not claiming any education or retirement savings contribution credits on their married filing jointly return. What is the amount of Ron and Sue's standard deduction?