Dorothie paid the following amounts during the current year:

Interest on her home mortgage (pre-12/16/17)	$9,250
Service charges on her checking account	48
Credit card interest	168
Auto loan interest	675
Interest from a home equity line of credit (HELOC)	2,300
Interest from a loan used to purchase stock	1,600
Credit investigation fee for loan	75

Dorothies residence has a fair market value of $250,000. The mortgage is secured by the home at the time of purchase and has a balance of $180,000. Dorothie used the same home to secure her HELOC with a balance of $50,000. Dorothie used the proceeds of her HELOC to pay for college and to buy a new car. Dorothie has $1,000 of net investment income. Compute Dorothies interest deduction in the following scenarios:

a. The current tax year is 2018. Use the Interest You Paid section of Schedule A on Page 5-23 to calculate Dorothies interest deduction for the current year. $10,250

b. Same as part a, and Dorothie used the HELOC proceeds to add a new bedroom to her home. $?

c. Same as part a, but Dorothies home is valued at $1.2 million and her mortgage balance is $900,000. $?