Math Quiz — NYT Learning Network

Through Math for America, I am part of an ongoing collaboration with the New York Times Learning Network. My latest contribution, a Test Yourself quiz-question, can be found here

Test Yourself Math — August 14, 2013

This questions relates to how questionable business practices by companies like Goldman Sachs allow them to earn extra profits on raw materials like the aluminum used for cans.  At an additional one-tenth of one cent per can, how much are these companies making from these practices?