How to Beat the High Cost of Living (1980)
How to Beat the High Cost of Living is a 1980 comedy film, starring Jane Curtin, Susan Saint James and Jessica Lange. Also in the cast are Dabney Coleman, Fred Willard, Richard Benjamin, Eddie Albert, Cathryn Damon, and a cameo by Jane Curtin's fellow Saturday Night Live co-star Garrett Morris. The movie was released in summer of 1980, grossing approximately US $7.5 million.
More at Wikipedia.