The average of a set of numbers is found by dividing the sum of the numbers by the amount of numbers in the set.
If the average of 8 numbers is 12, that means that the sum of the numbers divided by 8 is equal to 12.
To find the sum, we need to multiply 12 by 8:
sum/8 = 12
(sum/8)*8 = 12*8
sum = 96
The answer is 96.