Dynamics 365 Field Service Attach (to existing subscription): £16.40 per user/month.Dynamics 365 Field Service: £78.10 per user/month.Dynamics 365 Customer Service Attach (to existing subscription): £16.40 per user/month.Dynamics 365 Customer Service Professional: £41.10 per user/month.Dynamics 365 Customer Service Enterprise: £78.10 per user/month.Dynamics 365 Sales Attach (to existing subscription): £16.40 per user/month.Dynamics 365 Sales Professional: £53.40 per user/month.