Administering a false multiple

[Scrapper1]

This didn't happen to me, thankfully, but apparently it actually did happen in a high school game in a neighboring state.

A1 jumps to release a 3-point try. Simultaneously, B1 fouls A1 in the act of shooting and B2 fouls A2 while trying to get rebounding position.

At the start of the play, Team B had 5 team fouls in the half. Since it's a false multiple, each foul carries its own penalty. Should there be a 1-and-1 shot in this situation by A2, since the team foul total is now 7? Or do we simply give A1 his free throw(s) for the shooting foul and then give the ball back to Team A?

In other words, we have to penalize both fouls; but do we penalize B2's foul as if it were the 6th team foul or as if it were the 7th team foul? Keeping in mind that they happened simultaneously, according to the official who told me the story.