[Infinity]

Not a good tutorial. You tell us that we should understand the code, but you don't explain what the code does.
You also make some (rookie) mistakes, like

pawn Code:

SendClientMessage(playerid,COLOR_WHITE"You got 15000$ for transferring the damaged passengers from LVAP to SFAP

Not closing the string/argument, no comma between arguments.

The worst part is this:

Quote:

I will update this soon I aint have the time now i will update this soon. But everything is fine nothing is messed.

If you don't have the time to write a proper tutorial, then don't. A rushed tutorial almost always equals a bad tutorial.