Question: A salesperson receives a weekly salary of $400. In addition, $10 is paid for every item sold in excess of 200 items. How much extra is received from the sale of 216 items?
1. **State the problem:**
We need to find the extra amount received by the salesperson for selling 216 items, given that they receive $10 for every item sold beyond 200 items.
2. **Identify the formula:**
Extra pay = $10 \times$ (Number of items sold $-$ 200)
3. **Calculate the excess items:**
Number of items sold = $216$
Threshold = $200$
Excess items = $216 - 200 = 16$
4. **Calculate the extra pay:**
Extra pay = $10 \times 16 = 160$
5. **Answer:**
The salesperson receives an extra $160$ for selling 216 items.
**Regarding the unnecessary information:**
All the given information is necessary to solve the problem, so the answer is "None of the information provided".