Down payment = $3000
Monthly payment = $225
Number of monthly payments made = 6
Total amount paid from monthly payments = Monthly payment * Number of monthly payments made
= $225 * 6 = $1350
Total amount paid so far = Down payment + Total amount paid from monthly payments
= $3000 + $1350 = $4350
Therefore, you have paid a total of $4350 so far for the car.