The impact of the fluctuation of the yen's exchange rate on the wholesale prices of Japan since the application of the floating exchange rate has become an issue that is worth studying.

进入浮动汇率以来，日元汇率波动对日本批发物价带来了怎样的影响是一个值得研究的问题。

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Morrisons' petrol director Mark Todd said the cut was the result of "a drop in wholesale prices, combined with an improved exchange rate".

BBC: Diesel price cut at UK supermarkets