John sells 20 woodburning for $15 each.  The wood cost $100.  How much does he make in profit?
He sells the woodburning for 20*15=$
<gadget id="calculator">20*15</gadget>
<output>300</output>
300.
So he makes a profit of 300-100=$
<gadget id="calculator">300-100</gadget>
<output>200</output>
200.

<result>200</result>