XSLT: add up number and print subtotal multiple times

Question

I\'m a beginner in XSLT and figured out that I cannot just add up numbers to a variable and change its value in any way.

I have a XML document with a list of numbers

Answer 1

You need a variation on Muenchian grouping. Start by defining a key as:

then use:

##

to sum the numbers in the current group.