Not informed on 7th team foul

[timasdf]

Hi all,

Here's the situation we had in a recent game that uses NFHS rules...

Team B commits 7th team foul. Scorekeeper does not notify officials. Team A inbounds at spot nearest foul.

A couple minutes later, Team A commits shooting foul. While reporting the foul, the official is notified that the previous foul should have resulted in 1-and-1 for Team A.

How do we fix this situation? Any specific rule references?

Thanks,
Tim in Hollywood