Task: Question Answering
Input (English): Question: Tough and Tricky questions: Word Problems.
A salesman's income consists of commission and base salary. His weekly income totals over the past 5 weeks have been $406, $413, $420, $436 and $395. What must his average (arithmetic mean) income over the next two weeks be to decrease his average weekly income to $400 over the 7-week period?

 Option A: $350

 Option B: $400

 Option C: $365

 Option D: $385

 Option E: $375
Output (English): Option C