Completely read your details. Will be done with maximum accuracy, user friendly input system, login to change rates, tick boxes option buttons drop down menus and all you require. I just need to know that do require everything to be done using simple excel only or visual basic of excel is accepted. input screens etc should be on excel sheet or separate dialog boxes. whether to make in excel 2007 format or excel 2003 format. we can go beyond power of excel within the excel. Waiting for your response.