Final answer:
Under the 20-4-10 rule, you should make a down payment of $4,500 (which is 20% of the car price) and ensure that your monthly payment does not exceed $895 (which is 10% of your monthly income).
Step-by-step explanation:
Based on the information provided, under the 20-4-10 rule, when buying a car you should aim to:
Make a down payment of at least 20% of the purchase price.
Finance the car for no more than 4 years (48 months).
Have a monthly car payment (including principal, interest, and insurance) that does not exceed 10% of your gross monthly income.
Given a monthly gross income of $8,950 and a car cost of $22,500, let's calculate:
Down Payment: 20% of $22,500 is $4,500.
Monthly Payment: 10% of your monthly gross income is $895.
Note that the monthly payment should cover not only the loan payment but also insurance costs, so the actual amount going towards the loan will be less than $895.