Burt spent $2.00 on a packet of basil seeds and $8.00 on potting soil.  The packet of seeds yielded 20 basil plants.  He sells each basil plant for $5.00 at the local farmer's market.  What is the net profit from his basil plants?
He spent $2.00 on seeds and $8.00 on soil for a total of 2+8 = $
<gadget id="calculator">2+8</gadget>
<output>10</output>
10.00.
He sells each of the 20 basil plants for $5.00 so he makes 20*5 = $
<gadget id="calculator">20*5</gadget>
<output>100</output>
100.00.
He made $100.00 from selling basil plants and he spent $10.00 to buy and grow the seeds. His net profit is 100-10 = $
<gadget id="calculator">100-10</gadget>
<output>90</output>
90.00.

<result>90</result>