Duke was at a garage sale when he spotted DVDs on sale.  They were separated by price into 2 different boxes.  In the first box, he found 10 movies that he wanted.  These were $2.00 apiece.  The second box was marked $5 each and he found 5 movies he wanted.  What was the average price of each of the DVDs he bought?
In the first box he bought 10 DVDs at $2.00 each, so he paid 10*2 = $
<gadget id="calculator">10*2</gadget>
<output>20</output>
20.00.
In the second box he bought 5 DVDs at $5.00 each, so he paid 5*5 = $
<gadget id="calculator">5*5</gadget>
<output>25</output>
25.00.
He bought 10+5 = 
<gadget id="calculator">10+5</gadget>
<output>15</output>
15 DVDs.
He spent $20 + $25 = $
<gadget id="calculator">20+25</gadget>
<output>45</output>
45.00.
The average price of each DVD is $45/15 = $
<gadget id="calculator">45/15</gadget>
<output>3</output>
3.00 each.

<result>3</result>