Welcome to the Honeycode community, @RobertKirk!
I'm not entirely sure what you're looking for, but I'm guessing you want to sum values in a table, grouped by a specific column.
Below is a demo I've written up. Consider the following table:
To sum all the values in the column 'Value' where 'Group' is equal to some value, use the following formula:
If you want to simply sum all of the 'Value' entries in the table, you can use the following formula:
This should give you something like this for the above demo table:
That is, in your case, the code would look something along the lines of:
=SUMIF(TableName[Origen], "Tikkie", TableName[Importe])
Or, if you want your code to be more robust (seeing as how you are using rowlinks, something like below should work (this one hasn't been tested):
=SUMIF(TableName[Origen], FINDROW(OrigenTable, "OrigenTable[Origen] = %", "Tikkie"), TableName[Importe])