Change, in transactions


Cost of the item, $7   


Payment with a $10 note

As 10 items together on one note



		*	($10, note)
		|
		*
		|
		*
		|
		*
		|
		*
		|
		*
		|
		*
		|
		*
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		*
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		*



Customer hands over $10

Shop assistant must then pay back $3 to make the net amout paid equal 

	to the required figure of $7






Change $3


		* * *			($3)



Net amount paid

	
		* * * * * * *		($7)