4.07.6 WO does not do costing properly

[ronwong]

Used to work a few versions ago.

Product A Product B Ttl
unit cost before 2.05 1.48 606.04
Units before 196 138
unit cost after 2.05 1.507517241 606.04
Units After 189 145
Wrong cost after 2.05 2.05

The above summarize what I tried to do.
Product B is manufactured
1 product A makes 1 product B.
I manufacture 7 units of A to B. After manufacture, 7 units of A should move over with unit cost 2.05 thus bring up the average cost of B from 1.48 to 1.507 so that total A and B total cost remains at 606.04.
But it took over the Product A cost of 2.05.

Did I do something wrong?
set product B as manufactured.
set up BOM.
Open WO, receive items, update costing, close WO.

[Exsonqu_Qu]

Hi, Rong:

What do you mean update costing? How do you do that and why?

Best regards!

Exson

[ronwong]

if i understand correctly, say 1 nut and 1 bolt makes a product, so if nut cost $1 and bolt cost $2, assume no labour cost etc, the end product will come out with a standard cost of $3.

In a closed system, if the erp system only have 1 nut and 1 bolt before the wo, the whole erp is worth $3, after the wo, there is zero nut and zero bolt and 1 end product, whole erp is still $3.

Now the before and after does not tie up. simple as that.

i manufacture 1 item to 1 item, you can assume that i have a blue nut, and i paint it red to make it a red one, assume not cost of labour or paint, i am really using it to "convert stocks" to move items between colours or attribute.

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i think i phrase it wrong when i say update costing, we just click on the costing to receive the raw material or sometimg, just the standard WO process, we dont do any manual adjustment anywhere.