Michelle and Mark are married and file a joint return. Michelle owns and unincorporated dental practice. Mark works part-time as a high school math teacher, and spends the remainder of his time caring for their daughter. During the current year, they report the following items:

Item				Amount
Mark's salary				$ 18,000
Interest earned on savings account				1,200
Interest paid on personal residence				7,100
Itemized deductions for state and local taxes				3,400
Items related to Michelle's dental practice
Revenues				65,000
Payroll and salary expense				49,000
Supplies				17,000
Rent				16,400
Advertising				4,600
Depreciation				8,100