Task: Question Answering
Input (English): Problem: a vendor buys 10 t - shirts at an average price of $ 14 per t - shirt. he then buys 15 more t - shirts at an average price of $ 11 per t - shirt. what is the average price q per t - shirt that the vendor paid for these purchases ?
Options: a. $ 12.20, b. $ 12.50, c. $ 12.55, d. $ 12.70, e. $ 13.00
Output (English): a