Replacing the logo itself took all of about 30 minutes (receive new picture, digitally retouch, overlay onto background image, resize, play around with transparency, save to png.)
Also, bear in mind, the 400 hours is 400 man-hours, which is a cumulative number based on the number of people involved. If you've never done business with government, let me assure you, it was a lot more people than necessary.
Absolutely. The man hours can easily pile up when you do a conf call with a half dozen folks where majority of them are on mute 90% of the time.
I recently did contract work for an agency and had instances where a simple spacing or image resizing took days of work because the client or the agency would understand and then forget that I must crop and/or resize images for them all to be of one size.