Hello,
First, I am new to this, and please correct me if we can do this in my way!
Let me give a breakdown! The whole business day of 8Hours, will cost you 150 euro, break it down per hour, 18.75. If you need a translation assistance for, lets say 35 min, I will charge you only 35/60*18.75=11.07. This is to save you from unnecessary money spent. If you have another document, will provide you with the fee structure.
I hope you agree. if you have any other suggestion please feel free to say so.
thnx
nuhi