For a store, recording the Number of Sales People (x) and Sales (y), in units of $1000, for several days, the least square regression line has slope = 0.86, and intercept = 8.63 . On a given day, Number of sales people working = 14. The estimate of sales on that day, in units of $1000, rounded to two places of decimal, is:

		17.38
		20.28
		15.83
		20.67