The tool you have selected is a MS Excel downloadable file. To begin using the tool, click on the link captioned 'Download Tool'. You will be directed through the standard interface for downloading files over the web. You can open the file in your browser window or save it to your computer. If you save it to your computer, we suggest that you save the file to a convenient location using the current file name. This type of tool requires macros to be enabled in order to use all of its features.