With your counter set at zero, begin by counting duplex receptacles. As each receptacle is counted color in the receptacle symbol with a green pencil. As you come across wiring devices other than a duplex receptacle, color in the device with a green pencil, mark the symbol on the bottom right of the drawing and keep count of that device by using hash marks.
To count receptacles in a multi-gang arrangement, such as a double duplex, mark the symbol on the bottom right of the drawing and use hash marks to keep count.
When you have finished the drawing, mark the duplex receptacle symbol on the bottom right of the drawing and enter the count taken from your conter.
Follow this same procedure for each drawing until all wiring devices have been counted.