online B2B hotel booking system with xml use

Here is the list of some website, for your understanding, like how we want the website for the Client. [login to view URL] [login to view URL] It will be a B2B online hotel booking website developed in php and drupal and ready for xml use. We should be able to add rates and promotion and should be able to make tarrif in system, (tarrif example ??" rates valid from , room types, etc, what I mean to say is once we get rate from hotel we will feed the rate in system, this feeding will generate one excel sheet and its should feed the same in online rates (this rate in excel sheet will creat same rates as it will show online at front end, so agent can use this tarrif for rates ??" the rate in system should calculate (nett rate plus our mark-up = selling rate)