Dropped 3rd Strike NFHS

[refd]

Less than 2 outs and first base isn't occupied, batter swings and misses. The catcher drops the ball on the 3rd strike and the ball kicks into fair territory. As the batter runner advances towards first base, she unintentionally makes contact with the ball that is in fair territory.

What is the ruling for NFHS? If she out or do you play on? If the dropped 3rd strike ball is in foul territory and the batter runner makes contact with the ball, does it change the ruling? I am struggling to find a direct interpretation of the rule.

Thanks for any and all help.