#### Answer

The unnecessary information in the problem is the salesperson's weekly salary of 350.
The extra money = 180

#### Work Step by Step

Weekly salary of salesperson = 350
Amount received per item for every item sold more than 200 = 15
Number of items sold = 212
Number of items sold more than 200 = 212-200 = 12
So, to find out the extra money he received we don't need the information about the weekly salary.
Therefore, extra money he received = 12 x 15 = 180