Initial screen
The time 15:30 is entered. 15:30 would be the stage start time (in FIA timing) or the stage finish time (in Rally America timing).
Then '+' is entered.
Then 45 minutes (RS time in FIA timing, transit time in Rally America timing).
Then '=' is entered. The arrival time is 16:15 and there is 49 minutes 37 seconds until the start of the check in minute.