Do you need it splitted automatically? or just calculated?
If you need it splitted then probably macro shall be used for that if just calculated - formulas would be enough (but will not too be easy). Let's focus on nformulas and let's assume in bolumn C in your first sheet there are Rates for given periods.
so in H3 (and copy it dow to rows 7:9) there will be formula:
In J3 (of course copy down too easier one:
L3 also easy:
but here we need real number. So the real one will be much more complicated and it will be an array formula*
as you see the first part is the same, we only inserted long sum instead of text "multiple"
Check it out in the attachment
*...confirmed by pressing CTRL+SHIFT+ENTER to activate the array, not just ENTER. You will know the array is active when you see curly braces { } appear around your formula. If you do not CTRL+SHIFT+ENTER you will get an error or a clearly incorrect answer. Press F2 on that cell and try again.
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