In magento cart page and checkout page, after giving billing information and shipping information, i understand that these details are sending to fedex, then the shipping rates are populating in cart page and chekout page, before sending theses details to fedex, i want to change the weight of the product, i Want to add additional value(this value is different for different products) multiplied with weight for each products in the cart, where i can add this, i am new in magento, could n't find where i can add this.
suppose user adding a product in to cart with weight of 2 pounds, i want to send these weight to 2*5 = 10pounds to fedex, so the quantiy of product will be one and weight will be new weight(actualweight*additional), these weight needs to send fedex and get shipping rates from fedex?, how can i do that in magento? please help.
