Use the inside of the folded "shopping list" to make detailed note when you have moved out of sight of the person you last observed. Have a real grocery list on the visible side of the form. The shop instructions even tell youwhat to do if you are approached by an employee and asked what you are doing.
These may not be the best assignments for relatively new shoppers, btw.
Based in MD, near DC
Shopping from the Carolinas to New York
Have video cam; will travel
Poor customer service? Don't get mad; get video.