Barbara went shopping in a supermarket. She bought 5 packs of tuna for $2 each and 4 bottles of water for $1.5 each. In total, she paid $56 for her shopping. How much did Barbara spend on different than the mentioned goods?
For the tuna Barbara needed to pay 5 * 2 = $
<gadget id="calculator">5*2</gadget>
<output>10</output>
10.
For the four bottles of water, she needed to pay 4 * 1.5 = $
<gadget id="calculator">4*1.5</gadget>
<output>6</output>
6.
On different goods Barbara spend 56 - 10 - 6 = $
<gadget id="calculator">56-10-6</gadget>
<output>40</output>
40.

<result>40</result>