Task: Question Answering
Input (English): Problem: a, b and c start a business each investing 20,000. after 6 months a withdrew 5000, b withdrew 4000 and c invests 6000 more. at the end of the year, a total profit of 67,600 was recorded. find the share of b.
Options: a. 20,000, b. 21,200, c. 21,600, d. 20,500, e. none of these
Output (English): c