It is 13 stone 8 pounds.
10.5 stone = about 66.7 kg
8 stone 10 pounds is 55.3383kg
8 stone 13 is 125 pounds.
It is 8 stone 7 pounds, approx.
I did a Google search for stone as a unit of measurement. Almost all references quoted 1 stone = 14 pounds, except one referred to a 'butcher's stone' weighing 8 pounds, so I'll go with the 14 pounds. 13 stones * ( 14 pounds/stone) = 182 pounds. 182 pounds * (0.4536 kg / pound) = 82.5552 kg
52.6167 kg
8 stone 3 pounds = 52.16 kilograms.
8 stone 12 pounds = 56.2454539 kilograms.
54.8847 kg
11 stone 8 pounds = 73.48 kilograms
7 stone 8 pounds = 48.081 kilograms