Hello, @François St-Onge !
How can I find out how much I am being billed for a virtual machine or other resources?
The Azure Pricing Calculator and Azure Pricing page are useful tools, but there are a lot of variables that can be difficult to capture when planning out exact costs.
Cost Management and specifically cost analysis allows you to track billing information as resources are used (note that there is a bit of a delay as billing units are processed). In your resource group, go to Cost Management > Cost analysis to see what you are being billed for. This is a feature I use frequently when I'm managing projects or experimenting with new services to keep an eye on what my costs are.
For an exact amount billed, you can view your billing usage and charges (as pointed out by @Anonymous ). In addition, you can set alerts, budgets, and more with cost management features.
https://learn.microsoft.com/en-us/azure/cost-management-billing/understand/plan-manage-costs