“Big Business” (1988) is a comedy film starring Bette Midler and Lily Tomlin, directed by Jim Abrahams. Here’s a quick summary: The movie centers on two sets of identical twins who are accidentally switched at birth in a small town hospital in 1940s rural West Virginia. One pair grows up poor in the countryside (the Ratliffs), while the other is raised wealthy in New York City (the Sheltons). Decades later, all four women — two played by Bette Midler and two by Lily Tomlin — cross paths when a b