curl --request GET \
  --url https://api.comm.com/api/analytics/performance/cost-analysis \
  --header 'Authorization: Bearer <token>'

{
  "summary": {
    "total_cost": "<string>",
    "total_calls": "<string>",
    "avg_cost_per_call": "<string>",
    "date_range": [
      "<string>",
      "<string>"
    ]
  },
  "daily_costs": "<string>"
}