I can't seem to start this mission for Lester using Michael, with the requirement being that I should come in "smart clothes". I tried changing clothes in my house (polo and jeans, or a full suit outfit) but I can't seem to start it. What is the right one to wear? And should it even be bought as well?
Another post in the same thread notes this caveat:
This information leads me to believe that any full suit is the correct choice, but you must make sure to keep your suit clean until you talk to Lester.