If unanticipated inflation is to borrowers as unexpected price drops are to which group of economic agents?

Unanticipated inflation helps borrowers because it reduces the real value of the money they owe. When prices rise unexpectedly, the money they pay back is worth less than when they borrowed it. In contrast, unexpected price drops negatively affect sellers or businesses, as they receive less money for their products than they expected. For example, if a store sells a product for $100 but suddenly has to reduce the price to $80 due to unexpected competition, the store loses out on the revenue it thought it would make. Therefore, just as inflation benefits borrowers, unexpected price drops hurt sellers.