Miss Grayson's class raised $50 for their field trip. Aside from that, each of her students contributed $5 each. There are 20 students in her class, and the cost of the trip is $7 for each student. After all the field trip costs were paid, how much is left in Miss Grayson's class fund?
The contribution of the students amounted to $5 x 20 = $
<gadget id="calculator">5*20</gadget>
<output>100</output>
100.
So Miss Grayson's class had $100 + $50 = $
<gadget id="calculator">100+50</gadget>
<output>150</output>
150 in all.
The cost of the field trip amounted to $7 x 20 = $
<gadget id="calculator">7*20</gadget>
<output>140</output>
140.
Therefore, the class of Miss Grayson is left with $150 - $140 = $
<gadget id="calculator">150-140</gadget>
<output>10</output>
10.

<result>10</result>