It is so very simple and quick to get the answer since - IF you need it - you can use the calculator that comes with your computer. But since you are obviously not able to do so, the answer is 86.
78 + 89 + 167 + 897 + 78 = 1309
87+42+78 = 207
141.6
The total sum is 78
The sum of 10 plus 8 is 18.
The total sum is 56
nothing
The sum is: 8
-8.
11 + 67 = 78
12+14=26+10=36+24=60+10=70+8=78 the answer is 78
It is: (85*2)+(78*8) = 794