Code change to VirtueMart code

Project has three requests: 1) Modify the browse layout of a VirtueMart theme from one row to two rows while maintaining layout div 2) Add an additional field to the VirtuaMart cart. Field will be labeled "Delivery Charge" and will be calculated at 15% of the subtotal and tax. 3) Modify browse layout to include the Attributes Field (with title and appropriate charge) without having to view "Product Details" page. Attribute Field should carry over the cart.