Year	PN bags used	PN bags wasted on ward	PN bags wasted as expired	Total cost of PN	Cost of PN per bag used
2011–12	808	58	0	£50 334	£62
2012–13	593	33	0	£35 011	£59
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2014–15	688	29	137	£46 340	£67
2015–16	801	38	305	£60 926	£76