(A) In all cases where a business license tax is based, in whole or in part, upon the number of employees engaged in the business, the average monthly number of persons employed by the business during the preceding calendar year shall be determined by the following formula: One-twelfth of the total number of employees earning wages for each month of the calendar year.
(B) When a business has existed less than 12 months of the year preceding the issuance of a business license, the actual number of months of existence shall be used in computing the fraction. If an employer has not previously engaged in business, he shall estimate the average number of employees who will be employed by him during the remainder of the calendar year.
('83 Code, § 5.04.110)