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If 10u adult tickets were sold sold on Saturday, (10u + 120) child tickets were sold on Saturday.

On Sunday, 9u adult tickets were sold , and 13/10 ( 10u + 120 ) = ( 13u + 156 ) tickets child tickets were sold.

9u + 13u + 156 = 816

22u = 660

u = 30

Money collected on saturday = 30 * 10 * 25 + ( 10 * 30 + 120 ) 12

= 7500 + 420 * 12

= 7500 + 5040

=12540

So $12540 were collected on Saturday tickets.

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