I have a website that currently uses Zen Cart 1.5.We use the standard shipping modules for UPS and USPS.However, these get the shipping rates using actual weight.This does not always work. We need to customize theshipping modules, or write a new one, to accommodate theexisting actual weight behaviors, and the ability to do thefollowing additional features:1) dimensional weight (volume; size of the box being shipped) with USPS and/or UPS2) ability to match a specific size shipping box(es) to a specific product 3) ability to indicate how many items per box a. if one item per box, use this size box b. if two items per box, use this size box c. up to 4 items per box4) ability to specify if a product can be combined into a. any shipping box (i.e. small items like a belt, bag) b. a box of at least X size5) ability to combine shipping of products in the cart given the dimensional weights and minimum box sizesAll features need to consider that the actual boxes shipped are not oversized box.If over-sized boxes are required, this will allow you to know that ahead of time.Requirements: - Familiar with how shipping rates work (actual weight vs dimensional weight)- Familiar with Zen Cart and modules- PHPTime Frame:Complete within 30 daysBudget is negotiable if you are able to provide valid reasons and experience.Budget cannot be increased in order for you to "learn" about shipping and Zen Cart