Sum for Trello is a productivity chrome extension. it's a free extension , it has 1,000+ active users since released its first version, it earns an average rating of 4.57 from 7 rated user, last update is 2185 days ago.
Trello Sum is a Chrome Extension that adds a little bit of functionality to Trello.com freely adapted/forked from Trello Scrum. Trello Sum allows you to count the visible card sum up total cost of cards per list. Cost is indicated between () in each card description. Now also works with negative costs since version 0.0.8.
You could download the latest version crx file or older version files and install it.
English (United States).
80% user give 5-star rating, 20% user give 2-star rating. Read reviews of sum for trello
You could find more help information from sum for trello support page.
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I got this tool to get a sum of $. Doesn't seem to do what it says
UPDATE - IT WORKS AGAIN- thanks for fixing!!! Was great while it worked, but now it is only giving the total number of cards, with no sum of items in parenthesis. The "options" are grayed out so can't find a way to fix.
Still a work in progress, but super handy and simple!