The total cost is shown when checking out.
VAT is added at required.
The initial license purchase is a one-off payment, which includes 12 months of support and updates.
After 12 months, the license is still valid and you can continue to use the software with no additional charges, but should you wish to download new releases or access ticket support, you would need to purchase a 1-year extension.
Otherwise, you can choose not to renew support and remain on the same version.