The lunchroom is full of students: 40% are girls and the remainder are boys. There are 2 monitors for every 15 students. There are 8 monitors. Every boy drinks, on average, 1 carton of milk, and every girl drinks, on average, 2 cartons of milk. How many total cartons of milk are consumed by the students in the lunchroom?
There is 1 monitor for every fifteen students because 30 / 2 = 
<gadget id="calculator">30/2</gadget>
<output>15</output>
15.
There are 120 students because 8 x 15 = 
<gadget id="calculator">8*15</gadget>
<output>120</output>
120
60% of the lunchroom is boys because 100 - 40 = 
<gadget id="calculator">100-40</gadget>
<output>60</output>
60.
There are 72 boys because 120 x .6 = 
<gadget id="calculator">120*.6</gadget>
<output>72</output>
72.
There are 48 girls because 120 x .4 = 
<gadget id="calculator">120*.4</gadget>
<output>48</output>
48.
The boys drink 72 cartons of milk because 72 x 1 = 
<gadget id="calculator">72*1</gadget>
<output>72</output>
72.
The girls drink 96 cartons of milk because 48 x 2 = 
<gadget id="calculator">48*2</gadget>
<output>96</output>
96.
They drink 168 cartons of milk because 72 + 96 = 
<gadget id="calculator">72+96</gadget>
<output>168</output>
168.

<result>168</result>