 
<translate> Ahịrịokwu dị mkpa n'amaokwu ahụ bụ: ụtụ isi ọkachamara bụ ego nke dabeere na nnukwu ego nke ọkachamara na ụgwọ ọrụ yana steeti ndị ọzọ dịka enwere ike ikpebi onye ọrụ. Ya mere, azịza ikpeazụ bụ nnukwu ego. <eng> The relevant sentence in the passage is: The professional tax is a slab-amount based on the gross income of the professional and salaried and as well as the other states as may be decided employee's. Therefore, the final answer is gross income. 