Use reasoning to lead to the answer of the following question:
Every year, Mabel gets as many quarters as she is years old. She always puts these and nothing else in a piggy bank. When she turns 7, how much money is in the bank?

7
On her second birthday she adds $.

5 because 2 x.

25 =.

5.

On her third birthday she adds $.

35 because 3 x.

25 =.

75.

On her fourth birthday she adds $1 because 4 x.

25 = 1.

On her fifth birthday she adds $1.

25 because 5 x.

25 = 1.

25.

On her six birthday she adds $1.

5 because 6 x.

25 = 1.

5.

On her seventh birthday she adds $1.

75 because 7 x.

25 = 1.

75.

The total is $7 because.

25 +.

5 +.

75 + 1 + 1.

25 + 1.

5 + 1.

75 = 7.

.

The final answer: 7