ferry to mali losinj from rijeka or pula

we are 2 families from germany and want to travel the 24.08 or 25.08.2013 by ferry to mali losinj.
can you tell us the price per family and the time when the ferry is passing the port Rijeka or Pula.
We both are a familiy with 3 children.
How long are we travelling in both cases by ferry?

all ferries to mali losinj are listed here:
https://www.croatiaferries.com/malilosinj-ferry-port.htm
fares (prices) are also listed – example:
https://www.croatiaferries.com/rijeka-malilosinj-ferry.htm