Hello,
You may log in to the support page: Services Hub (microsoft.com), fill in the required information, and check the pricing there. The currency will be based on your location.
If you have a work account, you can also contact Microsoft for confirmation: Global Customer Service phone numbers - Microsoft Support
Other reference: Microsoft Professional Support (pay-per-incident): FAQ - Microsoft Support
I hope this information helps.
Best regards,
Karlie Weng