I am using version 1.3.8.

I sell customized t-shirts. Rather than charge a set up charge I want to charge a higher price for the first shirt and a little less for number 2 on up.

Example:
first shirt = $19.95
second shirt = $14.95
If customer orders 2 shirts, cost would be $34.90 (19.95+14.95)

Make sense?

How do I do it?

I've played with attributes, quantity discounts and That Software Guy's mod. None do it.

Or I am doing it wrong.

HELP?