Stephen borrowed $300 from his sister and promised to return it with an additional 2% of the money he owed. For 11 months Stephen will give his sister $25 per month and the remaining amount, including the interest, will be paid on the twelfth month. How much will Stephen pay in the twelfth month?
Stephen will pay an additional $300 x 2/100 = $
<gadget id="calculator">300*2/100</gadget>
<output>6</output>
6.
He should return a total of $300 + $6 = $
<gadget id="calculator">300+6</gadget>
<output>306</output>
306.
For eleven months Stephen will pay a total of $25 x 11 = $
<gadget id="calculator">25*11</gadget>
<output>275</output>
275.
Therefore, Stephen will pay 306 - 275 = $
<gadget id="calculator">306-275</gadget>
<output>31</output>
31 on the twelfth month.

<result>31</result>