What are some basic skills that a person employed in retail should have? Would every person, even the disabled, possess all of #1?
Retail
Most retail jobs require employees to be able to lift, push, and pull 25-50 lbs.  Retail positions require employees to interact with customers regularly. Various disabilities can diminish one's ability to interact with the public.
Sale of goods and services from individuals or businesses to the end-user
Is retail a job anybody can be suited for?