Sales order extension events order...

Dear experts,

I am facing a major issue because of the order events firing in dev and test tenants.

In dev tenant while developing I found that the order of sales order extension scripts are as follows.

1. ItemTotalValues.node : Event _aftermodify
2. TotalValues.node : Event _aftermodify

Based on this I did some calculations in ItemTotalValues.node and then calculate in TotalValues.node.

I deployed the solution in test tenant and found the result is not coming as expected. So i created a patch in test tenant and checked .Now the order in test is

1. TotalValues.node : Event _aftermodify
2. ItemTotalValues.node : Event _aftermodify

This is actually creating issue in expected result. Please help.

What is the exact oredr , or whether this can change?

Thanks ,

Resmi