I-485 please help

[areghit]

One month ago I sent the applications of my family (mine, my wife and my two sons).

The application of my two sons returned back. The reasons given are:

1. The check amount is incorrect, or has not been provided.

2. A signature is not contained in the signature block of the application or
Petition.

My questions:

1. I sent with the application a check of 600.00 dollars for each of them, but couldn't get the checks with the returned document.
If this is not the correct amount, how much should I send for each child?

2. My sons are under 10 and couldn't sign by themselves. I signed for them in part 5 of I-485. Was that wrong? Should I signed in part 4? If I have to sign in part 4, do I have to sign and write my name or write for and the name of each child?

Thank you very much for your help.

[mariew]

The same thing happened to me. My huband sent in me and my son's application and it was returned. I had sent in $600.00 for my son but i did not send in the $355 for the I130. So now if you are sending in the application after you had submitted your wife's application the cost will now be $930 so that is an increase of $330 to be sent with your application plus the $355 for the i130.