[Famalamalam]

Get all positions of Sprunk Machines in San Andreas. Put them into an array. Use OnPlayerKeyStateChange to check if KEY_EXIT (or whatever it's called) is pressed and if it is pressed use IsPLayerInRangeOfPoint to scan through the array of Sprunk Machine positions, if they are near a Sprunk machine, deduct some money. However, this could be buggy, you'd have to use a very small radius in IsPlayerInRangeOFPoint.