[ES: Speculation] If you're sampling at or above the Nyquist rate, so presumably twice a day, you'll be able to capture changes in inventory. If you are also r

[ES: Speculation] If you're sampling at or above the Nyquist rate, so presumably twice a day, you'll be able to capture changes in inventory. If you are also recording dates on boxes, you should be able to distinguish between sales and waste. Eg, you recorded an item as expiring tomorrow, and the next day it expires in 3 months - it probably got thrown away without being purchased. (Though this probably wouldn't work with things they can change dates on, like bakery items. It's a health code violation but a ubiquitous one.)