Update objective function costs in docs

[moyner]

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[codecov-commenter]

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 56.72%. Comparing base (947dca8) to head (db19599).
⚠️ Report is 9 commits behind head on main.
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Additional details and impacted files

@@            Coverage Diff             @@
##             main     #368      +/-   ##
==========================================
+ Coverage   56.05%   56.72%   +0.67%     
==========================================
  Files         210      221      +11     
  Lines       28948    29540     +592     
==========================================
+ Hits        16227    16758     +531     
- Misses      12721    12782      +61     

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