We need to add UPS and USPS shipping calculator to our wordpress website thefabricexchange.com so that it calculates everyone's shipping based on their address and weight of item and then charges them accordingly for the service they use. The shipping API's are available on UPS's and USPS's sites:
It will be the "Rating" API
Price Calculators APIs
I understand this is not a simple task, I have spent a lot of time and money getting my wordpress site to work right and I don't want it to cause any issues with it so please whoever gets this job MUST be experienced with this sort of thing and know what he is doing, it is a working ecommerce store and would prefer no down time. Please do all your research before contacting me, once again I can't stress enough that this needs to be done with great care and precision, we don't want any changes that will effect the performance of our online store.
Please let me know how much this is gonna cost as well.