Is it possible to publish an app to Windows Phone Marketplace as _free_ and later change the price? [closed]

Question

Is it possible to publish an app to Windows Phone Marketplace as free and later change the price of the very same app, without changing anything else? I mean the stats, reviews etc remains in this case, the app is the same, the price raised from free to some value after a promo time period, say 3 months.

I know that it is possible with Apple AppStore, I also know it is not possible with Android Market (btw what about Amazon Android store?, but this is out of topic here)

Unfortunately I did not find related info about WP7/WP7.5 Marketplace.

Thx for answers