It takes time to process your registration be it ONE number or ONE HUNDRED numbers. That's why you see so many "bulk” discounts.
QUANTITY 1 10 50 500
We provide the Check Digit (12th number) $20 $80 $200 $800
You look up the Check Digit (12th number) $20 $30 $50 $100
To save money, finding the 12th check digit yourself is extremely easy,
we can provide websites that do this