Reporting numbers after a foul

[BillyMac]

IAABO Handbook (page 55)
Foul Procedures
B. Reporting the foul
6. State the color of the jersey and the number of the player who fouled. Simultaneously, using one hand only, signal to indicate the number of the player who fouled.

Since I'm using one hand to show each individual digit of the player's number, I simultaneously state each individual digit of that number. That's the way we've been taught here in Connecticut, even when we were using NFHS mechanics, back in the good old days. That's my story, and I'm sticking to it.

What do NFHS mechanics say?