How much does the day ticket for Germany cost?

1 passenger: 
Total price: EUR 46
Price per person: EUR 46

2 passengers:
Total price: EUR 55
Price per person: EUR 27.50

3 passengers:
Total price: EUR 64
Price per person: EUR 21.33

4 passengers:
Total price: EUR 73
Price per person: EUR 18.25

5 passengers:
Total price: EUR 82
Price per person: EUR 16.40