Mary had five outfits in this episode, if you count the first outfit with and without the coat separetely.
1) In the opening scene, Mary is seen in a thigh-length brown coat with white fur trim and cuffs, high off-white boots, carrying a brown eather handbag.
2) For her job interview, the coat is gone, and the outfit underneath is seen -- a ribbed white short-sleeved top with two pockets, a pleated beige skit, and an overlong brown leather belt at the waist.
3) The next morning, she is wearing a long white-trimmed pink "nightie"
4) On her first day on the job, it's a brown skirt set with white windowpane piping, a collared white shirt, and a long brown-and-white silk scarf
5) For her date at her apartment, she's in black vest and flared pants, with a fancy white shirt, and a long silver belt.