After Andrea saved some money, she then spent the rest of her money on an $11 sweater and gave her brother $4. If she had $36 in the beginning, how much did Andrea save?
Andrea spent and gave her brother a total of $11 + $4 = $
<gadget id="calculator">11+4</gadget>
<output>15</output>
15.
So, she saved $36 - $15 = $
<gadget id="calculator">36-15</gadget>
<output>21</output>
21.

<result>21</result>