How to count numbers in a field (or label) in one line / column (automatic)

Question

I am looking for a way to count numbers together in a specific field or label, on all cards that are in a line / column (in this case times, example: 1.5 hours). Counting together only on one board and in one line, not across multiple boards.

Example: Card A-1,5h, Card B-1h, Card C- 0,5h = 3 hours as result. What is then displayed per column - either in the column itself (like result A) or in an extra table (like result B) . (see also screenshot)

Is there a possibility maybe?

Many thanks

Frank Zdunek · Answer

Thank you very much for your answer. We have found, for us, a solution.
And that is via a Chrome extension, 'PM fpr Trello'. It is not 'directly' in Trello but it can calculate.
Also about 'BusinessClass' I have not found the function(?).

Rodrigo_4v6t2o · Answer

Sorry Frank, Trello doesn't go well in maths. This would probably require some custom coding, like creating a power up from scratch using Trello's API.