Costs from cost managem azure portal are not allligned with costs calculated from usage system table

vziog
New Contributor III

Hello,
the costs regarding the databricks service from cost management in azure portal (45,869...) are not allligned with costs calculated from usage system table (75,34). 

The costs from the portal are filtered based on the desired period (usage_date >='2025-04-11') and the resource group where the workspace resides:

Azure Databricks      Azure Databricks             Premium All-purpose Compute DBU           45,8694226916667

this is the query i am using which gives 75,34:

%sql
SELECT u.workspace_id
  ,u.sku_name
  ,p.pricing.default
  ,u.usage_date
  ,usage_start_time
  ,usage_end_time
  ,usage_quantity
  ,((unix_timestamp(usage_end_time) - unix_timestamp(usage_start_time))/3600) * usage_quantity*p.pricing.default as costs
  ,usage_quantity*p.pricing.default as costs2
FROM system.billing.usage u
  left join system.billing.list_prices p on u.sku_name=p.sku_name

WHERE
 
  u.workspace_id='xxxxxxxxxxxxx'
 
  and p.price_end_time is null
  and u.usage_date >='2025-04-11'
  and p.sku_name='PREMIUM_ALL_PURPOSE_COMPUTE'