Why had the price of cheap plastic sunglasses increased a lot

The reasons are as below

1)The material of raw material has increased a lot.

The price in 2020 is RMB10/KG,but now the price is RMB16.0/KG.

2)Due to che covid-19,the shipping cost has increased a lot.

Most of container can’t come back to china on time.

So there is not enough container for goods of cheap plastic sunglasses.

So shipping company increased shipping cost a lot.

It is expensive and hard to get an container for goods of cheap plastic sunglasses.

3)Exchange rate has changed a lot

In 2020,1 USD =RMB6.52

But now ,1USD=RMB6.38

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