- $1.8B as "cost of revenue" (costs incurred to run their business),
- $1.25B on "research and development",
- $1.2B on "Sales and Marketing", and
- ~$1.3B together on "general and administrative" (overhead) and "litigation settlement".
Then there are a bunch of small monies related to interest expense and income, etc etc.
They're spending huge amounts of money and could be profitable if they really wanted. I can't imagine what Twitter is doing with 1.25B in research. Elon could make Twitter profitable simply by cutting their research department.