Just made a simple excel file to track my costs, and decided to compare it to my previous cost of smoking analogs. Figured others might like to track their expenses as well, so I created this simple template for you to use. Obviously, the newer you are to vaping, the less savings you are going to have.
A link to download the template is here: VapingExceltemplate.xlsx
And I'll post a quick screencap example of use:

Hope you find it useful.
A link to download the template is here: VapingExceltemplate.xlsx
And I'll post a quick screencap example of use:

Hope you find it useful.