8 kuintal + 3,25 ton - 340 kg - 500 ons = kg

8 kuintal = 8 x 100 = 800 kg
3.25 ton = 3.25 x 1.000 = 3250 kg
340 kg = 340 x 1 = 340
500 ons / hg = 500 / 10 = 50

800 + 3250 - 340 - 50
4050 - 340 - 50
3710 - 50 = 3660
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