Wordpress Call Rates Calculator Plugin

I need a word press plugin that will allow me to enter & update my own call rates on my website [login to view URL] so that it looks like this [login to view URL] , i have the raw data what i need is a plugin to take in some 255 countries etc Alternatively you maybe able to finish coding the plugin that is currently installed which would be better No chancers please only bid if you can show experience of having done this before.