How to grant read-only access to "Costing - Inventory Valuation Real Time" without UI Access

Summary:

How to grant read-only access to "Costing - Inventory Valuation Real Time" without Application access.

Content (required):

We have a requirement where we need a user to access "Costing - Inventory Valuation Real Time" without role "Cost Accountant" as this role has lots of application functions that we don't want to provide to the user. the user should see only "Costing - Inventory Valuation Real Time" but he should not have "Cost Accountant" role.

so please we need your support what should we do exactly to achieve this. if custom role is required, please provide detailed steps to make this work.