MAP calculation under price control S

Hi Knowledge ,

How system calculates MAP in pricing indicator "S"

i am aware of the Formula :

MAP = Total stock value / Total stock.

After Gr

MAP = ( Total Value old + Gr value ) / (Total stock old + GR quanity ).

(5122.49+60000)/(1050+100)

162.02

But system is proposing 114.83 as MAP

Old

New After GR

Made a PO for 60 Q unit price is 100

Made a Gr for full quantity : FI document is posting with other values ,

EX : Standard Price is 50.97 - PO price 60 FOR 1000 Q

Entry at Gr :

Thanks

Murali.V