Task: Question Answering
Input (English): Problem: an investor can sell her microtron stock for 36 $ per share and her dynaco stock for 60 $ per share, if she sells 300 shares altogether, some of each stock, at an average price per share of 40 $, how many shares of dynaco stock has she sold ?
Options: a. 50, b. 75, c. 92, d. 136, e. 184
Output (English): a