See the topic Recalculate to learn about the Recalculate Options available when recalculating financials for Event Attendee Registration Group Functions.
You can multi-select Event Attendee Registration Group Functions under the Event's Function Registrations tab, and use the Recalculate command from the ribbon directly above the selection grid.
Figure 362: Recalculating Multiple Registration Functions
You can also open an individual Event Attendee Registration Group Function edit form, and access the Recalculate command in the top ribbon.
Figure 363: Recalculating Registration Function from Edit Form
You can also Recalculate, Set Best Rates, and Update Rates for Event Attendee Registration Group Functions in the Edit Event window.
Review the topic Registrations under Edit Event Window / Function Setup.