Hello with a question!

[killbillgr21]

Hello guys
I am new in the forum.I have some basic knowledge about forex.Although,I have an assignment to do for university and I need some help from the experts on this forum. My question is:where do the currency exchange offices(like those on airports) supply money from? They sell on more expensive rates, so they need to get money with the current rate in stock market in order to make money from the spread.If you have any additional information I would like to tell me.
Please help me out

[capsmart]

Hello Bill
Since I see that you are from Greece, send me a PM and we will arrange a telephone meeting where I will explain you how things work because I believe that you have everything mixed up.
Regards
Vassilis