Good morning,
Here is a rough stab... I've changed all of the months to numbers. I assume these need to show the previous descriptions. I would incorporate these codes as descriptions and hide the numbers, but the numbers are what drive the calculations. Anyway, the only part that will probably be questioned is the December figure. The rounding simply has to go somewhere, and December was the simplest. You could probably do something to distribute this rounding error, but I can't think of anything simple offhand.
Hope this helps,
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