Hi @Tid14
One way would be to summarize all the fields to get the total, then union it back to the data set. This is a very common question - here are a few posts that might help get you in the right direction. If you post some data (i.e. not a picture) we can mock it up if any of the solutions below are unclear.
Solved: Adding total row - Alteryx Community
You can use a Summarize tool to sum each column you want, just delete the sum_ prefix from the names.
Then you just need to use the formula tool to add a "new" column named the same as your leftmost column, and give it the value of "Total".
Use union afterwards, to get it all back together.
See attatched workflow