According to Jim - Season 3 Episode 1 The Errand

When Jim finds out that Cheryl has been paying 7 dollars to have the groceries delivered to their house, he insists that he does the shopping himself in order to save that incredible amount of money. Once at the supermarket, he sees how married men are "domesticated" by their wives and decides to rebel against Cheryl by shopping everything but the items on the list. Cheryl decides to turn the table on Jim and he does the same, until they end up going to a formal party on robes and underwear with their bodies all painted with lipstick. Cheryl finally gives in and they settle on paying the delivery boy the seven dollars in order to spare the Spice Channel subscription.