Janet goes to the mall and spends $3.50 on ice cream, $7.50 each for movie tickets for herself and her younger sister, and $8.50 on a bracelet. If her parents gave her $40, how many dollars does she have left?
First calculate the cost of the movie tickets by multiplying the price per ticket by 2: $7.50 * 2 = $
<gadget id="calculator">7.5*2</gadget>
<output>15</output>
15.00.
Then add up all the money Janet spent: $3.50 + $15.00 + $8.50 = $
<gadget id="calculator">3.5+15+8.5</gadget>
<output>27</output>
27.00.
Now subtract Janet's spending from the initial amount of money she had: $40.00 - $27.00 = $
<gadget id="calculator">40-27</gadget>
<output>13</output>
13.00.

<result>13</result>