The price to register your trademark will vary depending on your country and the number of Trademark Classes you’re registering in.
For information on US Trademark Registrations: https://www.uspto.gov/trademarks-application-process/filing-online/trademark-application-fee-structure
For information on Canadian Trademark Registrations: https://canadian-trademark.ca/costs/
For information on UK Trademark Registrations: https://www.gov.uk/government/publications/trade-mark-forms-and-fees/trade-mark-forms-and-fees#trade-mark-applications
For information on European Union Trademark Registrations: https://euipo.europa.eu/ohimportal/en/route-to-registration