Tiered option dropdown print price calculator integration into shopping cart system.

Hi Guys - I have previously had an excellent script written for me in php for a printing tiered price dropdown price "calculator" that sorts through my options as it references from a text database file, like you might find on many popular printing websites. I am wanting a programmer to integrate the script into either a wordpress, magento, or opencart off the shelf ecommerce system. I suspect that this maybe easier done in wordpress using WP e-commerce or PHPurchase plug ins. For those interested in quoting I can email script to you (which you may not re distribute). Any additional info you require please PM me. Thank you.