Thanks Boomer and Groovico!
So far I have gotten a good response from it and am pleased.
I've now created a version for 3.5.x PRO. Anyone interested can check it out here.
http://www.bcsengineering.com/store/catalog/Inventory_Pricing_Xcart_Modification_35x_PRO-p-24.html
Coupon for the Pro version is "inventorypro" without the double quotes.
Carrie