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**mom****Member**- Registered: 2012-04-25
- Posts: 94

If I am paying a down payment of $300 and payments of $200 per month for 3 years with an interest rate of 12% compounded monthly, how do I calculate the cost of the car?

Am I on the right track using:

F=[(1+i)^n-1/i]*R+down payment = $8,915.38

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 84,442

Hi mom;

How much is left on the car?

**In mathematics, you don't understand things. You just get used to them.I have the result, but I do not yet know how to get it.All physicists, and a good many quite respectable mathematicians are contemptuous about proof.**

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**mom****Member**- Registered: 2012-04-25
- Posts: 94

Bobby,

I gave all of the information that the problem gives me.

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 84,442

Hi;

How can I calculate the cost without knowing what is left? Does this imply that the payments are over? The car is paid for?

**In mathematics, you don't understand things. You just get used to them.I have the result, but I do not yet know how to get it.All physicists, and a good many quite respectable mathematicians are contemptuous about proof.**

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**mom****Member**- Registered: 2012-04-25
- Posts: 94

a down payment of $300 and payments of $200 per month for 3 years with an interest rate of 12% compounded monthly. I have to calculate the total cost based on downpayment + payment for 3 years at 12% compounded monthly

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 84,442

Hi mom;

Wouldn't the total cost be different depending on how much dough was left unpaid? If 31000 dollars is left then surely the original cost was different than if 8000 dollars is left.

**In mathematics, you don't understand things. You just get used to them.I have the result, but I do not yet know how to get it.All physicists, and a good many quite respectable mathematicians are contemptuous about proof.**

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**mom****Member**- Registered: 2012-04-25
- Posts: 94

Its paid off in 36 payments. 3 years once a month

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 84,442

Hi;

I am getting 6021.50 + 300 = 6321.50 for the price of the car.

I have the result, but I do not yet know how to get it.

All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

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**mom****Member**- Registered: 2012-04-25
- Posts: 94

Thank you so much!!!

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 84,442

Did the answer check out?

I have the result, but I do not yet know how to get it.

All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

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**mom****Member**- Registered: 2012-04-25
- Posts: 94

It did. Thanks again

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 84,442

That is a very good price for a car.

I have the result, but I do not yet know how to get it.

All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

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