Step 1

Goals
Ask Zeki about a trading permit.
Dialogue with

Zeki: Oh! Saw those little trading posts I set up, didya? My little attempt to teach folks about more... legitimate forms of bartering.

Zeki: See, I heard you Humans have been gettin' real into trading lately, and I thought I'd help facilitate those deals.

Zeki: Course, I can't have just anyone conducting business on my grounds. So I've come up with a little quiz.

Zeki: Prove you've got what it takes to become a proper merchant, and I'll give you a trading pass and full permission t'use the stands whenever you want.

You: "How do I prove myself?" 2 lines

Step 2

Zeki's informed you that in order to start trading plushies, you'll need to pass his quiz. He's set up "Quiz-o-Matics" around the Underground for you to speak to.

Goals
Pass the quiz.
Turn-in Dialogue with

Zeki: Yep, got the info from my Quiz-o-Matic already. Cute little thing, ain't it?

Zeki: Anyways, I already got your pass printed out, so here ya go! Oh, and just in case you ain't got anythin' to trade yet, I've got another special reward for ya.

Zeki: Enjoy, pal, and happy trading!