You can use the script below to find how many customers of each type.
select b.type_code as "Query 8 - AR_Customer - Type of Customer - **Provide results to the customer to review for accuracy**",
b.inactive as "Customer Type Inactive?", count(a.customer_type_id) as "Number of Customers"
from ar_customer a, ar_type_of_customer b
where a.customer_type_id=b.type_id
and a.customer_id<>1
group by b.type_code, b.inactive, a.customer_type_id