You can upgrade your shops to Level 2, Level 3, ...ect. Now correct me if I'm wrong, but upgrading the shop adds quanitity to your restocking, meaning you get more stock for every restock. However, does upgrading the shop also lower the amount of time it takes to stock an item? Or does every shop have their own stock time regaurdless of the level of the shop.
Also, does the type of shop have anything to do with stock times? For example, do food types tend to stock faster/slower than recreation and so on.