Calculate count based on filter and if statement

I have a table with columns for branchName, stageName, date, and count of how many times that day a build from that branch successfully executed that stage.

Something like this:

I want to create a visual that displays the total count of successes for a given stage during a given time period with a caveat.

Successes from the "develop" branch are unique but successes from any other branch should be treated as duplicates. For example, if I am calculating successes for Stage "R0" in the month of November, the calculation should be something of the sort: 89 + 38 + 1 + 1 (89 unique successes from develop on 2020-11-25, 38 unique successes from develop on 2020-11-26, 1 success in total from snap/1016, 1 success total from snap/1017).

I want to be able to change the date filter for the whole dashboard at any given time. If I didn't need to change the date filter, I would just change my initial query (in Kusto) to this: