AMC 12 2014b Problem 6

Ed and Ann both have lemonade with their lunch. Ed orders the regular size. Ann gets the large lemonade, which is 50% more than the regular. After both consume $\frac{3}{4}$ of their drinks, Ann gives Ed a third of what she has left, and 2 additional ounces. When they finish their lemonades they realize that they both drank the same amount. How many ounces of lemonade did they drink together?

\textbf{(A)}\ 30 \textbf{(B)}\ 32 \textbf{(C)}\ 36 \textbf{(D)}\ 40 \textbf{(E)}\ 50