Virtuemart Category Discounts

[jtaylor]

Job Description: currently have a detailed pricing structure that is qty driven and date driven which works a treat using existing virtuemart components.

Example: 100 > 299 = $1.60
                300 > 599 = $1.50
                600 > 999 = $1.40

on top of this during a specified date we can apply a 10-15 or 20% discount on top of this.

Now I need the items in the same category to look at the quantities and provide the same pricing bracket. I need this to happen for multiple categories.

Example: Product 1 x 200 added to cart
                Product 2 x 150 added to cart
                = $1.50 per unit to be displayed
At the moment it looks at the products individual and charges $1.60 per unit.

Using Virtuemart 1.1.5
Please provide quote on completing work...Job is required ASAP.