A salesperson receives a weekly salary of \( \$ 500 \). In addition, \( \$ 30 \) is paid for every item sold in excess of 200 items. How much extra is received from the sale of 210 items? Which piece of information is not necessary to solve the problem? Weekly salary \( \$ 30 \) fee paid for every item in excess Number of items sold 200 threshold None of the information provided How much extra is received? \( \$ \)

To calculate the extra received from selling 210 items, we first find the number of items sold in excess of 200: \( 210 - 200 = 10 \). Then, we multiply the excess items by the commission per item: \( 10 \times 30 = 300 \). Therefore, the extra received from selling 210 items is \( \$ 300 \). As for the unnecessary information, the weekly salary of \( \$ 500 \) doesn’t influence the computation of extra income from the sales since we only need to focus on the items sold above the threshold to determine the additional earnings.