What is the best way to do this bulk pricing?

Hello Everyone :)

I need an opinion here please. Ive managed to install zen cart, usps module and do some attributes as well, finding all of the answers in your forum.... THANKS ! I haven't seen this one so I thought I would ask.

Here are my details:

Zen Cart Version 1.3.0.2 New Install

Server Host: ws6 (ws6)
Database Host: mysql1.100ws.com (64.72.112.117)
Server OS: Linux 2.6.17.8-SE
Database: MySQL 4.1.11-Debian_4sarge5
Server Date: 08/28/2006 22:06:21
Database Date: 08/28/2006 19:06:21
Server Up Time:
PHP Version: 4.3.4 (Zend: 1.3.0)
HTTP Server: Apache/1.3.33 (Unix) mod_ssl/2.8.22 OpenSSL/0.9.7d VDB/1.1.1

PHP version 4.3.4

Q: I sell Breast Cancer Awareness Items and Costume Jewelry. I sell in bulk for fundraisers as well. I need to set up my zencart so certain products are bulk priced starting at 12 peices or more. It would be ideal if customers could use a dropdown menu starting at 12 pieces and it cascades down to 13, then 14, and so on to accomodate how many pieces they may need. Of course the amount of pieces would be reflected in the shopping cart, example 13 pieces at 1.00 each would show as $13.00, 14 pcs would show as $14.00 and so on.

I currently have it set up as blocks of 12 pcs in a wholesale section which you can view here :

http://dynamicmerchandiseusa.com/index.php?main_page=index&cPath=11

The problem is that some people do not wish to buy in blocks of 12, they may want 18 or 19 or whatever.

Any input would be greatly apprecated...

Thanks in advance....

Sincerely dmlf