I have a question here that I was told to clarify. So I'll try to.

Question

Here's the question (its a 2 part question)
1) a) You purchase a new car for $16,725.00 plus 6.15% sales tax. The down payment is $1,400.00 and you have an average credit rating. How much interest is accrued after the first month?

Average Secured-5.85 Unsecured- 6.20

1) b) You purchase a new car for $16,725.00 plus 6.15% sales tax. The down payment is $1,400.00 and you have an average credit rating. If you improved your credit score to good and paid $2,100 on your purchase, how much interest could you save in the first month

Instead of posting the entire graph, I just took out the important part: the Average credit rating( both secured and unsecured.)

All I know about solving this is that we're supposed to use only ONE of the average ratings depending on what we're buying. Since its a car I think we're supposed to use the secured rating.