Methods of Promote Sales of Super Market Products

(1) _____________which provides information from customers about their views on displayed products.

(2) _____________that films the customer as he shops and monitors his physical movement.
 
A more sophisticated technique includes devices Like (3)_______________
 
Using a particular program called (4)_______________
  Which tells the retailer which products sells best in
  Which part of the store?
  
In also suggests the most profitable combination of
  An article and (5)__________________in the store.