The effect of inflation could be different by the reason.

>> CORRECT

OR

>> The effect of inflation could be different depending on the reason.

Recently, there was rapid inflation on Kakao bean's price index. 

>> CORRECT

The main reason was decreasing of producing of kakao bean, due to climate changes and deteriorating of the kakao trees in biggest country of production(Gana, Ivory coast).

>> The main reason was the decrease in Kakao beans due to climate changes and the deterioration of Kakao trees in the biggest country of production (Gana, Ivory Coast).

This situation caused chocolate manufacturer demanded increasing price of products to importer, and it reached to my company. 

>> This situation caused a chocolate manufacturer to demand a price increase of products to importers and also affected my company.

At first, I didn't know that this circumstance was about not only price, but also supplyment stability. 

>> At first, I didn’t know that this circumstance was not only about the price but it was also about supply stability.

My boss guided me to secure the stock of relevant products ahead, and advise me to regard the inflation as long-term events. 

>> My boss guided me to secure the stock of relevant products ahead of time and advised me to regard inflation in the long term.

In this case, the inflation affect procurement work to seek the reason and take action for preventing worse happening.

>> In this case, the inflation affects procurement work. Taking action is needed to prevent the worst from happening.