312
the adult membership fee is 120, so for 2 adults we times by 2 to get 240
As stated the junior membership fee is 1/5 of the adults, and 1/5 of 120 is 24 (you can use a calculator to help you if needed)
There are 3 juniors so we do 24x3 = 72
And we add this fee to the adults:
72+240 = 312
Hope this helps!!