You will be returned to Bob's initial screen, but notice that now there's an option to ship the goods to Alice:

Click on Ship Order to indicate that the goods have been shipped to Alice:

Bob can now see that as far as the letter of credit process is concerned, he is finished–the order has been shipped.

But Bob hasn't yet received payment–Alice must receive the goods first before this can happen. Note the history in the bottom right hand corner of Bob's web page. Bob can see where he is in the overall process, and that some steps need to be completed before he receives payment:

Let's return to Alice to continue with the next step in the process.