Another quote from "The Office" where they discuss "whomever" vs "whoever".

Ryan: What I really want, honestly, Michael is for you to know it so that you can communicate it to the people here, to your clients, whomever.

Michael: Oh, okay.

Ryan: What?

Michael: It's whoever, not whomever.

Ryan: It's whomever.

Michael: No, whomever is never actually right.

Jim: Nope. Sometimes it's right.

Creed: Michael is right. It's a made up word used to trick students.

Andy: No. Actually, whomever is the formal version of the word.

Oscar: Obviously it's a real word- but I don't know how to use it correctly.

Michael: [to camera] Not a native speaker.

Kevin: I know what's right. But I'm not gonna say. Because you're all jerks who didn't come see my band last night.

Ryan: Do you really know which one is correct?

Kevin: I don't know.

Pam: It's whom when it's the object of the sentence and who when as the subject.

Phyllis: That sounds right.

Michael: Well it sounds right, but is it?

Stanley: How did Ryan use it? As an object?

Ryan: As an object.

Kelly: Ryan used me as an object.

Oscar: Is he right about that?

Pam: How did he use it again?

Toby: It was, Ryan wanted Michael, the subject, to explain the computer system, the object.

Michael: Thank you!

Toby: ...to whomever, meaning us, the indirect object. Which is the, the correct usage of the word.

Michael: No one, uh asked you anything ever so whomever's name is Toby, why don't you take a letter opener and stick it in your skull!