Can anyone help me with this, please? I'm unable to get the correct formula for this.
Could you please share dimensionalities of the two modules? You can find it in Appies to or Pivot of the modules.
I think you should simply select the source and automatic aggregation will work or just a SUM function. But anyway let's look at dimensions first.
In the REV02 module there is no formula and you need to write a formula to populate the volumes from DATA02 SKU Volumes module. Try it, Best of Luck!
In the target module you need to check dimensionality where volumes need to be loaded vs the source and refer the volumes from SKU module , it depends on dimensionality between source and target module , for eg if rev02 has SKU as dimension or any parent as dimension , then directly the module can be referred since it will be an aggregated or direct reference , else you will need to apply sum or lookup accordingly