start with -9.55. then do that number plus 136.32. which is 126.77. then 82.77 for phone bill which leaves you at 44$ then divide by 4$ because thats how much a gallon is worth =. that leaves you with 11. so you can afford and put 11 gallons of gas in your car!! :)
Imagine, it's you, your dad and your grandpa. Then your father and father's father make two fathers and similarly your grandpa's son, your dad's son make two sons.