The following chart shows retail stores’ average percent profit margin on certain items.

Product Category........................Average Profit Margin (%)
Video equipment ............................................12
Audio components..........................................14
Stereo speakers.............................................20–25
Extended warranties....................................50–60

(a) Determine the average profit of a store that has the list price of $620 on a camcorder.

(b) Determine the average profit of a store that has a list price of $1200 on a pair of speakers (use a 22% profit margin).

(c) If you negotiate and get the salesperson to sell the speakers for $1000, find the store’s profit (use a 22% profit margin).