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@Carolyn Slaw wrote:

Yes, they will do want is best for both. 

I was going to allocate 100% to child and 0% to parent. 

I think we can allocate column c any way we want.

 

 

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You can only choose the allocation if all three of my questions are "yes".  Assuming that is the case ...

In most cases it has the  best result to allocate 100% to the child.

All three columns must be allocated the same way.