How do I pay the visa application fee?

[Zeebot9 3]

I have paid the affidavit of support fee of $120. But it won't let us do anything else on the website. My wife called and said they told us we need to pay a $325 application fee. How do I pay this fee?

[Zeebot9 3]

There are two types of fees. Click the “Pay Now” buttons to pay any required Affidavit of Support fees or Immigrant Visa Application fees. Note the application fee must be paid by each person who is immigrating, and cannot be paid until after NVC has reviewed the Form DS-261 you submitted in Step 1. 

So we have filled out the DS-261 and it says completed. Does this mean it has not been approved? Because I was able to pay the AOS fee.