Amount in document currency & group currency is different

dear all,

In my company i have been activated material ledger & parallel currency. I want to make sure is my setting is correct or not and i want give the example:

<b>Material master data:</b>

MAV material :

Company code currecny : 20000 IDR

Group currency : 2 USD

<b>Purchase Order (foreign currency)</b>

PO currency : 2 USD

Qty order : 10 PC

<b>Result of FI document on GR transaction(Exchange rate : 9000):</b>

Document Currency

Inventory 22,22 USD 200000 IDR

GR/IR 20 USD 180000 IDR

ML 2,22 USD 20000 IDR

Group Currency

Inventory 20 USD 200000 IDR

GR/IR 20 USD 180000 IDR

ML 20000 IDR

My assumption, calculate to get amount inventory in document currency & group currency is different,

Document currency:

<u>Previous MAV (IDR) * Qty GR</u>

Current Exchange rate

Group Currency :

Previous MAV (USD) * Qty GR

My question is it correct, amount in document currency & group currency is different. If not correct there is other config to setting that.

Thanks for your help..