The sentences that should be included in a summary of the text are:
- John Fitch combined old methods of constructing boats with new technology to create the first steamboats.
- Fitch's boats cost too much to make.
The first option regarding Robert Fulton, while factually accurate, does not encapsulate the main contributions and challenges faced by Fitch. The last option about wanting to ride on a steamboat is subjective and irrelevant to the summary.