Harold's fancy wrapping paper can wrap 5 shirt boxes or 3 XL boxes.  For the upcoming holiday, he has 20 shirt boxes to wrap and 12 XL boxes to wrap.  If each roll of wrapping paper costs $4.00 per roll, how much will he spend to wrap all of the boxes?
1 roll can wrap 5 shirt boxes and he has 20 shirts boxes to wrap so he needs 20/5 = 
<gadget id="calculator">20/5</gadget>
<output>4</output>
4 rolls of wrap
1 roll can wrap 3 XL boxes and he has 12 XL boxes to wrap so he needs 12/3 = 
<gadget id="calculator">12/3</gadget>
<output>4</output>
4 rolls or wrap.
All total he needs 4+4 = 
<gadget id="calculator">4+4</gadget>
<output>8</output>
8 rolls of wrap.
Each roll costs $4.00 and he needs 8 rolls so it will cost him 4*8 = $
<gadget id="calculator">4*8</gadget>
<output>32</output>
32.00 in wrapping paper.

<result>32</result>