So this afternoon due to boredom I created a little spreadsheet that totals what I have spent on vaping, what I would have spent on smoking, how much I have not smoked, calculates my YTD balance, break even date, 1 year projection (minus expenditures) and so forth. Are there any other useful calculations my fellow geeks are putting in their spreasheets? As long as I don't buy a Provari and go crazy on flavors I will break even in a month! The Provari would bump it up to 2 months, which makes it even more tempting...