Hello. I am running a fairly new installation of Zencart 1.3.9h. There is nothing very customized about my site except some template tweaks.

Most of my products use quantity discount pricing, and several of them have simple attributes. That is all working well.

However, I would like to add some more customizable products which ideally would include a quantity discounted attribute. Let me explain. For example, I would like to add a product called "hardhat decals". This product would have quantity discount pricing for the basic product, which is a one-color decal. However, additional colors are possible and there is an additional cost for each added color. For example:

qty 12-23 decals, one color = $4.95 each; each added color is +$0.80 per color
qty 24-49 decals, one color = $3.90 each; each added color is +$0.60 per color
qty 50-99 decals, one color = $2.85 each; each added color is +$0.50 per color
qty 100+ decals, one color = $1.90 each; each added color is +$0.40 per color

So, for example, if I were ordering 75 qty 3-color decals, the base price would be $2.85 each + 2 x the add color price for that quantity bracket (+ 2x $0.50) = $2.85 + (2 x $0.50) = $3.85

Do you know of any way to do this?

I also have products which add a third quantity-discounted price factor into the mix. These are decals for which the size also contributes to the calculation of price. So, I am thinking the best option might be to construct a simple script to ask a series of questions and "pre-calculate" the price and set the attributes and pass that information to zen-cart. Is that possible or advisable? I could probably write the PHP script and/or modules necessary, but I would need to know how to plug them into Zen-Cart properly without breaking anything...

Any ideas, recommendations, or cautions would be greatly appreciated!

My site: http://www.fireconcepts.com