At a museum, 6 children’s tickets and 4 adult tickets cost $59.50 altogether. The total cost of 2 adult tickets and 3 senior tickets is $35.90 altogether. If each adult ticket costs 2 times as much as each children’s ticket, what is the total cost of 4 senior tickets and 2 children’s tickets? Include two decimal places in your answer. For example if the answer is $12 enter it as $12.00.