Final answer:
Dennis paid approximately $9,561.27 in interest on his car financing.
Step-by-step explanation:
To calculate the amount Dennis paid in interest, we first need to find the total amount he financed. The list price of the car was $23,878, and Dennis received 85% of the trade-in value of his Honda Odyssey. Let's calculate the trade-in value: Trade-in value = 85% x $2,000 = $1,700
So, the total amount financed was: Total amount financed = List price - Trade-in value = $23,878 - $1,700 = $22,178
Now, we can use the formula for compound interest to calculate the interest paid: Interest = Total amount financed x (1 + interest rate/number of compounding periods)^(number of compounding periods x number of years) - total amount financed
Plugging in the values: Interest = $22,178 x (1 + 0.1182/12)^(12 x 3) - $22,178
Using a calculator, the interest comes out to be approximately $9,561.27.