I am working on bonds. I am currently working the Bowman Corporation homework question. I have gotten to step 4 in inflows.

I am working on bonds. I am currently working the Bowman Corporation homework question. I have gotten to step 4 in inflows. I see where you get the original amount for the underwriter fee but I do not understand were you get the amount written off, which is the next step. Can you help me with this?