More customers?

[yukiashi]

Do more customers come in if the prices of the items are cheaper?

[KJKillercom]

Not from what I can tell. From my experience more customers come as you play longer. After about day 30 things start to get a bit more hectic.

[Soups]

I believe more customers come if you raise the difficulty level as well.

[Lizardbutt]

Both of the above are true, in my experience