How much is Multi-Tenant Orchestrator license price?

I would like to know how much the cost for Multi-Tenant Orchestrator license is.
Does it cost more than Single-Tenant ?

The detail is the below.

I am running a Single-Tenant Orchestrator instance with 3 robots. I want to add a new 3 tenants. I would like put new Users and Assets the 3 new tenants. I would like to access the Users and Assets data via REST API only.

In that case, how much is the additional cost I should pay for ?

Regards,

Check this - Licensing @ken_morita