I always have some trouble criticize someone. Whether it’s too harsh or too soft, it’s just not working. But, I know that if it’s done properly will make someone change their behavior. Maybe the feedback sandwich is a good solution. Feedback sandwich means that you give a feedback between positive encouragement. Some tips :

Stay Positive: If you go into this with a positive attitude the exercise will have a positive outcome. Likewise, a negative attitude on your part will guarantee a futile result.

Practice: It’s a good idea to practice in front of a mirror - or better yet in front of another person - before you do this. You want the presentation to be smooth with a good flow.

Coach Regularly: If you make this a normal routine, you will get better and the individuals you are coaching will become less apprehensive about it. Don’t become obsessive about it, though, or you will lose both credibility and impact.

How to Give a Feedback Sandwich [via Wikihow]

If you want to convert any currency to Indonesia Dollar Rupiah (IDR) you can use simple Google search. Example

50000 JPY in IDR

You can do it both ways.

100000 IDR in EUR

And if you want to have another measurement and calculate it to IDR, such as BBM Price per Litre :

123 USD per Barrel in IDR per Litre

It’s a lot quicker way than to run Calculator on your Desktop, but I wonder where Google defines his Currency Rates.

Google Currency Features