Thomas buys a weight vest.  It weighed 60 pounds and worked well for him in the beginning but after a bit of training he decides he wants to increase the weight by 60%.  The weights come in 2-pound steel ingots.  Each ingot cost $5 and if you buy more than 10 you get a 20% discount.  How much does it cost to get the weight he needs?
He needs to buy 60*.6=
<gadget id="calculator">60*.6</gadget>
<output>36</output>
36 pounds.
So he needs to buy 36/2=
<gadget id="calculator">36/2</gadget>
<output>18</output>
18 weight plates.
That would cost 18*5=$
<gadget id="calculator">18*5</gadget>
<output>90</output>
90.
Since he bought more than 10 he gets a discount so he gets 90*.2=$
<gadget id="calculator">90*.2</gadget>
<output>18</output>
18 off.
That means he paid 90-18=$
<gadget id="calculator">90-18</gadget>
<output>72</output>
72.

<result>72</result>