You do market research and assess the likely purchases of trailers by different market segments at different whoesale price levels. Given the data below, plot your first estimate of market demand:

		SALES BY SEGMENT
Price $/unit	Bike Shops	On-Line	Lg Retail	Sport Goods
20	1600	2500	5000	3100
30	1300	2200	4000	2500
40	1100	2000	2500	2000
50	950	1850	1500	1800
60	850	1750	1000	1750
70	900	1700	0	1700