If statement

I got help for this formula from the forum a while back. Now I need to make some changes. Could you please help . . . again

( please see the attachment)

The spreadsheet is used as an Audit tool to review the accts worked:

Each P error code entered should deduct 20% of a 100% (multiple codes can be entered).


If no errror is entered in the error code field - it should show 100% in the calculation column


Each F error code should show 0%
Thank you!