Answer:
240
Step-by-step explanation:
If you are referring to:
2 + 4 + 6 + 8 + 10 + 12 + 14 + 16 + 18 + 20 + 22 + 24 + 26 + 28 + 30, then your answer would be 240
Hope this helps :)
Answer:

Step-by-step explanation:
Rule:

Your problem:

66-(3*2)
60/5= 11
so 11$ for the three who didn't rent shoes and the two who did spent 14 each