The graph below shows the average monthly change in the prices of three metals during 2014.

The line graph illustrates the alteration of the cost of copper, nickel and

zinc

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per month in 2014.

Overall

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,

it is clear that

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the prices of all three metals experienced significant changes.

Nickle

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Nickel

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price showed the most variation during the year.

To begin

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with, nickel recorded 6% in January. Over the next two months nickel price dropped dramatically

to

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by

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1% and remained stable for a month. Afterwards, the figure continued to decline and reached its lowest point of -3% in June.

However

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, the changes became positive in November and December at 1%, after oscillation. Turning to the remaining metals, copper and

zinc

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stood at 2% and 1% respectively in January.

Although

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the

zinc

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price rose

initially

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to

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by

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3% in February, it fell steadily to -1% in June. After some fluctuations, the cost of

zinc

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overtook others, reaching 2%. Meanwhile, copper plunged to just below 0%

,

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before climbing to a little above 1% by December.