Order the data:
8, 105, 120, 125, 125, 154.
Mode is 125 (most repeated data).
Sum of data: 637, size of data: 6, mean=637/6=106.2 (approx).
Median is central datum, but, because there is no centre we take the average of the centre two: (120+125)/2=245/2=122.5.
Mean=106.2, median=122.5, mode=125.