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my approach
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cur_worst: 664 = 2343 * 84 / 296
moved: +3
amount: 1679 = 2343 - 664
ratings_sum: 212 = 296 - 84
moved: +6

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nielsm's approach
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cur_worst: 317 = 2343 * 84 * 84 / 52000
moved: +1
amount: 2026 = 2343 - 317
ratings_square_sum: 44944 = 52000 - 84 * 84
moved: +8


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master approach
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worst_cargo: 664 = 2343 * 84 / (212 + 84)
moved: 6
amount - worst_cargo: 1679 = 2343 - 664
moved: +3