To find this answer, I just did a bit of guess and check. I took 71+65+x (random numbers in the general area of those numbers). Then I divided that by 3 to find the average of the three numbers. So, (71+65+96)/3=77.(3). (95 is too small because its exactly 77 when the average is found.) Hope this helped!
Because they cost $25 to make so in order to cover the cost they would need to charge at least 25, but out of those choices if they wanted to make a profit they'd need to charge the $50
