Change 5400 millilitres to litres.

1 ml = 0.001 litres

5400 ml = 5.4 litres

5400/1000 = 5.4
Divide 1000 by moving the decimal point forward 3 times

Because he made a down payment of $3,000 he gets to subtract it out of the $7,500 that he needs to pay for the car.
$7,500 - $3,000= $4,500 
In order to find out the monthly payments you need to devide the $4,500 by the number of payments.
$4,500/36= $125 < Answer 
$125 =The monthly payments