One way that companies can reduce supply without customers realizing it is by changing the size of the packaging. This actually makes the per unit price higher, which matches with the theory of decreasing supply. This decrease in supply could come from changes in input prices or perhaps shifts in agricultural markets, like freezes in Florida and oranges.
While trying to spy on a local fish accident, Dee has an accident that causes the business to shut down for a bit. This reduction in supply is shown later when Dennis, Mac, and Charlie go to a restaurant for lunch and intend to order fish. Because of the reduction in supply, the market price for snapper has gone up to $44, but the guys buy the fish anyway since they are charging it to Frank’s card.
Thanks to Maggie Sciabica for the reference!