我将免费应用程序更改为应用程序商店中的付费应用程序后待定合同状态

I had a free app which was released and ready to sale some days back on app store.Now i made it a paid app by setting 0.99 dollars .Now my status is changed to pending contract.What does this status mean?.what is the procedure after that and how much time it will take to get approved again?? I had a free app which was released and ready t