A pen costs as much as a pencil and eraser combined. A pencil costs $1.20 and an eraser costs $0.30. How much will 8 pens cost?
A pen costs $1.20 + $0.30 = $
<gadget id="calculator">1.20+0.30</gadget>
<output>1.5</output>
1.50.
So, 8 pens cost $1.50 x 8 = $
<gadget id="calculator">8*1.5</gadget>
<output>12</output>
12.

<result>12</result>