That seems pretty reasonable to me for a professional freelance design from scratch like that. I normally expect individual pages to cost in the range of $1k from scratch.

Whoa $780 for that design? I personally would not have even charged for that preliminary design. Why are you designing any way. Where are the rough sketches and wireframes? Did you not learn that in school? Wireframes first, then discuss with management to get a better understanding of the underlying goals and objectives. Get them on the phone and ask lots of questions about the company, management, customers and the overall scope of the project.