To determine which debt Alice should target first using the stack method, also known as the debt avalanche method, she should focus on the debt with the highest interest rate.
Looking at the debts in the table:
- Debt 1: 5.5% interest, $75 minimum monthly payment
- Debt 2: 2.75% interest, $250 minimum monthly payment
- Debt 3: 13.25% interest, $150 minimum monthly payment
The highest interest rate is for Debt 3 (13.25%).
Now, if Alice is applying an extra $150 on top of the minimum payment, her total monthly payment for Debt 3 would be:
Minimum monthly payment for Debt 3: $150
Extra payment: $150
Total payment for Debt 3 = $150 + $150 = $300
Thus, the first debt Alice targets to pay off is Debt 3, and the monthly amount she applies to it will be $300.
So the correct answer is: Debt 3, $300.