Charging more than real fruit juice MRP

I ordered one real fruit juice for my 8 year old, He spoke with someone and they said the rates are 40 rs, I knew its a big hotel and the costs can be high so I asked them again why is it more than MRP? They said it is management decided rates, I said OK, then they called again and said the rates are 70 rs… 90% of profit on a 20 rs thing?? This is so wrong on so many levels.