The Arevalo family went out to dinner. The smoky salmon costs $40, the black burger costs $15, and the chicken katsu costs $25. If the bill includes a 10% service charge and 5% tip, how much change will Mr. Arevalo receive from his $100?
The total amount spent on food is $40 + $15 + $25 = $
<gadget id="calculator">40+15+25</gadget>
<output>80</output>
80.
The service charge is $80 x 10/100 = $
<gadget id="calculator">80*10/100</gadget>
<output>8</output>
8.
The tip is $80 x 5/100 = $
<gadget id="calculator">80*5/100</gadget>
<output>4</output>
4.
So, Mr. Arevalo had to pay $80 + $8 + $4 = $
<gadget id="calculator">80+8+4</gadget>
<output>92</output>
92 in all.
Therefore, his change will only be $100 - $92 = $
<gadget id="calculator">100-92</gadget>
<output>8</output>
8.

<result>8</result>