a common methodology for the calculation of the weight of metals that have been recycled in accordance with paragraph 6, including quality criteria for the recycled metals, and
modheolaíocht chomhchoiteann le haghaidh ríomh mheáchan na miotal a athchúrsáladh, i gcomhréir le mír 6, lena n-áirítear critéir cháilíochta do na miotail athchúrsáilte, agus