Value on Sitemap

Hello guys, I have a quick question.

In my Rules I script that var Number DagreesStatus and I use that var with no problem , now what I want is to bring this for example right now DagreesStatus== 22, I want it to show on my site maps Dagrees - 22 , every time this var is change I want it to be update on my site maps.

What should I need to do?

Create an Item and update it with your calculated value.

Thank you.