Answer:
The amount of money saved = $0.6
Explanations:
There are 12 rolls in 1 dozen
6 rolls = $3.60
1 roll = 3.60 / 6
1 roll = $0.6
13 rolls = 0.6 x 13
13 rolls = $7.8
The price of a dozen rolls = 0.6 x 12
The price of a dozen rolls = $7.2
This means that if she had paid for 13 individual rolls, she would have paid $7.8
But she was given a bakers's dozen (consisting of 13 rolls) at the price of a dozen rolls ($7.2).
The amount of money saved = $7.8 - $7.2
The amount of money saved = $0.6