To find the amount of interest paid on the auto loan, we can use the following formula:
\[ \text{Interest} = \text{Total Payments} - \text{Principal} \]
In this case:
- Total Payments = $24,000
- Principal (Cost of the car) = $18,000
Now we can calculate the interest:
\[ \text{Interest} = 24,000 - 18,000 = 6,000 \]
Therefore, the interest on the loan is $6,000.