A small bookstore keeps data on the number of sales people working and the daily sales (in thousands of dollars). The regression line is Sales = 8.56 + 0.841 # of Sales People Working, and we can assume that the assumptions and conditions for regression are met. Calculations with technology find that s. = 1.306 and SE (b, ) =0.0772. Complete parts a through b. Click the icon to view the data table of the number of people working and sales. a) Find the predicted sales on a day with 500 employees working. The predicted sales are thousand dollars. - X (Round to one decimal place as needed.) Table of Number of people working and sales. Number of Sales Sales People Working (in $1000) 11 11 16 15 10 16 10 16 12 17 15 22 16 24 20 25 x = 10.4 y = 17.3 SD(x) = 5.64 SD(y) = 4.90 Print Done