Question 2815
Can you correct the question - I guess here you mean that he worked for 16 1/2 hours per day. Is that right ?

Assuming he worked for $12 per hour and he worked 16 1/2 hours a day for 1 week (7 days), his salary would be -

Salary per week = 12 * (16 1/2) * 7 = 84 * 16.5 = $1386