I think I figured out the answers to my questions.
The Adjusted Cost Basis in the Supplemental Tax Info should be used in the 8949. In the example above it is $5,396.
The value for Column 1(f) should be 'B' and for 1(g) should be 0.
This is explained in chrome-extension://oemmndcbldboiebfnladdacbdfmadadm/https://communications.fidelity.com/sps_library/docs/bro-tax-espp-click.pdf
The instructions for form 8949: https://www.irs.gov/instructions/i8949
In particular, the section How To Complete Form 8949, Columns (f) and (g)
I am reasonably certain I am now on the right track, but if another knowledgeable person can confirm this, it will be good.
