The weights of five boxes are 10, 30, 50, 70 & 80 kilograms. Which of the following cannot be the total weight, in kilograms, of any combination of these boxes?
Combination of 160 kilograms = 70, 50, 30, 10
Combination of 180 kilograms = 80, 70, 30
Combination of 150 kilograms = 70, 50, 30
But there is no combination for 220 kilograms.
$$\therefore$$ The correct answer is option B.
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