 When Captain Peacock has to report that sales on a rainy day in a gloomy conjuncture have reached rock bottom -naught- Mr. Rumbold comes over to examine their selling technique and then demonstrates, playing a customer with Mrs. Slocombe, how much better it would be if Mr. Humphries greets customers; Peaock, who fears for his position, then plays an utterly impossible customer, causing a shouting match just when Mr. Grace stops by, who then announces they ll either suffer a 10% pay cut or be moved to the bargains cellar, where no commissions will be earned. After a desperate brainstorming they decide to strike and demonstrate on the roof, but Peacocks plan with  military precision  proves precisely disastrous...