You can check out the full ALF Season 1 Guide on IMDb to see where this episode falls in the Shumway saga. ALF Reviews: "Keepin' the Faith" (Season 1, Episode 5)
In the ALF Season 1 episode ALF becomes sensitive about being a "parasite" and decides to get a job to pay his way. He ends up Maxing out Willie's credit card to buy a massive stock of "Terry Faith Cosmetics" for a Tupperware-style house party. [S1E5] Keepin' the Faith
In Season 1, Episode 5, "Keepin' the Faith," ALF finally feels the heat. After being called a "parasite" (harsh, Willie!), our favorite furry houseguest decides it's time to join the workforce. The Ultimate Side Hustle You can check out the full ALF Season
Here is a blog post written from a retro-pop culture perspective: Can an Alien Sell Cosmetics? Revisiting "Keepin' the Faith" In Season 1, Episode 5, "Keepin' the Faith,"