James is a first-year student at a University in Chicago. He has a budget of $1000 per semester. He spends 30% of his money on food, 15% on accommodation, 25% on entertainment, and the rest on coursework materials. How much money does he spend on coursework materials?
Accommodation is 15% * $1000=$
<gadget id="calculator">15*.01*1000</gadget>
<output>150</output>
150.
Food is          30% * $1000=$
<gadget id="calculator">30*.01*1000</gadget>
<output>300</output>
300.
Entertainment is   25% * $1000=$
<gadget id="calculator">25*.01*1000</gadget>
<output>250</output>
250.
Coursework materials are thus $1000-($150+$300+$250) = $300.

<result>300</result>