Explanation:
convert every option in kg to the same unit in g
1kg=1000g
so 8kg = 8×1000 = 8000g
8.06kg = 8.06×1000 = 8060g
now the values can be written as
8060g, 8000g, 6g, 8600g
now arranging in increasing order I.e from smallest to biggest:
6g 8000g 8060g 8600g
which in its original unit is
6g 8kg 8.06kg 8600g