All store owners should be jailed, then, since the presence of inventory on their shelves is proof of a scheme to generate excess profit by charging higher than market-clearing prices - or it would have sold already.
We only know current inventory. As I write this in early March stores are starting to order their halloween candy (the orders need to be in by somethime in april). You do not know what candy your competitor will order, but this is relavant to sales since you will price match their ads and in turn lower priced candy will sell in greater quantities.
