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Title: TRE cost report sequence diagram _: ** /api/costs** CLIENT->>API: get overall TRE costs API->>ARM: get resource groups by tag "tre_id"=tre_id ARM->>API: Resource group list with all tags API->>COST: get costs filtered by tag "tre_id"=tre_id or list of resource groups and grouped by resource group and tag COST->>API: costs note: aggregate tagged and untagged costs by Tag, Resource Group, Currency and Date API->>API: get shared services list API->>API: get all workspaces API->>CLIENT: OK /w json TRE combined costs Note over API,A: combined overall costs grouped by component (TRE core, shared services, workspaces) _: **/api/workspace/{workspace_id}/costs** CLIENT->>API: get TRE workspace costs API->>ARM: get resource groups by tag "tre_workspace_id"=tre_workspace_id ARM->>API: Resource group list with all tags API->>COST: get costs filtered by tag "tre_workspace_id"=tre_workspace_id and grouped by tag COST->>API: costs note: aggregate tagged and untagged costs by Tag, Resource Group, Currency and Date API->>API: get workspace by workspace id API->>API: get workspace services by workspace id group: loop per workspace service API->>API: get user resource by workspace service id end API->>CLIENT: OK /w json TRE combined costs Note over API,A: combined workspace costs grouped by workspaces services and user resource