For a certain play performance, adults' tickets were sold for $12 each and children's tickets were sold for $8 each. How many children's tickets were sold for the performance?
(1) The total revenue from the sale of adults` and children`s tickets for the performance was $5,040.
(2) The number of adults` tickets sold for the performance was $$\frac{1}{3}$$ the total number of adults` and children`s tickets sold for the performance.