The following information is available for Bob and Brenda Horton,a married couple filing a joint return,for 2015.Both Bob and Brenda are age 32 and have no dependents. 
a.What is the amount of their gross income?
b.What is the amount of their adjusted gross income?
c.What is the amount of their taxable income?
d.What is the amount of their tax liability (gross tax)?
e.What is the amount of their tax due or (refund due)?
Definitions:
One-One Principle
A fundamental principle of counting that states each object being counted must be assigned one, and only one, number to represent it.
Gelman
A cognitive psychologist known for her work on the development of categorization and reasoning in children, especially in understanding numbers and biology.
Count Words
The process or activity of determining the number of words in a text or document.
Order-Relevant Principle
involves the idea that the sequence or arrangement of elements or events can significantly affect understanding, memory, or perception.
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