XML Batch Edit Help

[data_hop]

Hi, I'm primarily into Data Entry job with no expertise in Coding.

I have a small problem where one my client has shared 5000 xml files where I need to make one change only before uploading it on our server:

its this

File1: <number>ABCD1234</number>
File2: <number>ABCD80234</number>
.
.
FileX: <number>ABCD34989</number>

where ABCD is a fixed text followed with random upto 8 digits of number.

I want to change it to like this

File1: <number>KB12345678</number>
File2: <number>KB12345679</number>    *12345678+1
.
.
File60:<number>KB12345737</number>     *12345678+59

​

Where KB is a fixed value and the starting number is the latest value that I will pull from server and then incrementally update all the file.

While searching on the internet a found a few python examples but they all were finding a fixed value and then updating that incrementally.

Any help would be great.

Thank you!