Using anglo saxon and real price costing method get wrong value for cogs as following :-
i make purchase for 10 unit with 100$ for each one and then buy another 10 with 120 $ for each one
Sold 15 and out term calculted with 1100 which is correct .
when i vlidated invoice booked cogs with 1800 it mean cost clculated from current cost price on product form not from cost when deliver this items so outerm account will has a credit balance with 700