Magento extension

Hi there, I need a custom extension for a magento webshop. It's a small startup webshop for construction materials. Basically what's needed is a tool which calculates what and how many building materials are needed for a set project based on the parameters set by the visitor. ## Deliverables Some of the parameters of the extension would be: Thickness of the building material: 20 mm /40 mm /60 mm /80 mm /100 mm /120 mm brickwork bond: Halfstone, Wildbond /Tileverbond Stonedimensions: WF 210x52 /DF 240x52 /RF 240x65/ NF 240x71 Color: 60 colors available depending on the chosen parameters before. Total per part: Fill in the total number of corners, plates, profiles etc. Automatic calculation of materials: How much materials are needed, total plugs, prout and PU foam need to be automatically calculated and need to be ticked in the order for seperately. Pricecalculation: Submit order and all materials are shown in the shoppingcart. Please submit an estimated price. Depending on the prices offered this project will become available asap or not. Happy bidding.. !!