When part(Inventory Valuation Method = Weighted Average) procure both from PO and PJ, the value is calculate incorrect.

When buy 1 part from PJ as 120 yen.
And then buy 2 pieces as 100 yen for one, transfer two to PJ.
The Project Analysis window shows debit balance as 333 yen and inventory is 0.
Which is incorrect because the true value is 320(120+100*2).
Also this is not correct in accounting.(diff 13)

Please consider improving the funtion.