E ndnote s 1 Los s t i m e i nj ur y f r e que nc y r at e L TI FR is a r at i o c al c ul at e d as f ol l ow s num be r of l os s t i m e in ju r ie s x 1 000 000 hour s di v i de d by t he t ot al num be r of hour s w o r k ed 2 T o t al r e por t ab l e i nc i de nt f r e que nc y r at e TR I FR is a r a ti o c al c ul a t ed as f o ll o ws n um b er of r e por t ab l e in ju r ie s x 1 00 0 000 h our s di v i de d by t he t ot al n um b er of hour s w o r k ed R e por t abl e in ju r ie s i nc l ud e f a t al i t i es l o st ti m e in ju r ie s r es t r i c t ed dut y in ju r ie s and m e di c al l y t r ea t ed in ju r ie s 3 Cl a s s 1 Hi g h S i gn i f i c anc e is d ef i n ed as an i nc i de nt t h at c au s es s i g ni f i c a nt ne gat i v e i m p ac t s on hu m an he al t h or t he e n v i r o nm ent or an i nc i de nt t h at ex t en d s ont o p u b l ic ly a c ce ssi b l e l a nd and has th e pot e nt i a l to ca u se s i gni f i c a nt adv e r s e i m pac t t o s ur r oundi ng c o m m u ni t i es l i ve st o ck or w ild lif e 4 F re e ca sh fl o w is a no n G AAP f i nan c i al pe r f o r m anc e m e as ur e w h i ch de duc t s c ap i t al e x pe ndi t ur e s f r om n et ca s h p r ov i ded by ope r a t i ng a c t iv i t ie s B a rri c k b el i ev es th i s t o be a us ef u l i n di c at o r of ou r a b i lit y t o o p er at e wit h o u t r el i a nc e on add i t i ona l bo r r ow i ng or us age of e x is t in g ca s h Fr e e ca sh f lo w is i nt e nde d to p r ov i de ad di t i ona l i nf o r m at i o n o nl y and doe s not h av e any s t a n d ar di z ed m e ani ng unde r I F R S and m ay n ot be c om p ar a bl e t o s im il a r m ea s ur es of pe r f o r m anc e p r es en t ed by ot he r c om p a ni es Fr e e ca sh fl o w s hou l d n ot be c o ns i d er ed in i s ol at i on or as a s ubs t i t ut e f or m ea s u r es of pe r f o r m anc e pr e par e d in ac c or da n c e wi t h I F RS Fo r f ur t h er de t ai l s on t h is non G AAP m ea s u r e pl e as e r ef er t o page 80 of t he MD A ac c om pany i ng B a r r i ck s f i r st quar t e r 2020 f i nanc i al s t a t e m e n t s f ile d on SED AR at www s e dar c om and on ED G AR at ww w s ec gov 5 A d j us t ed n et ea r ni n gs and a dj u s t ed n et e ar n i ngs p er s ha r e ar e non G AAP f i nanc i a l pe r f or m an c e m ea s u r es A dj u s t ed n et e ar ni ngs ex c l u d es t he f o ll o win g f r om n et e ar n i ngs c er t a i n i m p a i r m ent c ha r g es re v e rs a l s r el a t ed t o i nt a n gi bl es g o o d will pr ope r t y pl a nt and eq u i pm ent and i n v es t m en t s gai ns l o sse s and ot he r one ti m e co s t s r e l at i ng t o a c qu i s i t i ons or d i s po s i t i ons f o r ei gn c ur r e nc y t r a ns l at i o n ga i ns l o sse s s i gn i f i c a nt t ax ad j us t m e nt s not r el at ed t o c ur r en t pe r i od ea r ni n gs u nr ea l i z ed ga i ns l o ss e s on non he dge de r i v at i v e i ns t r u m e nt s and t he t ax ef f ec t an d non c o nt r ol l i ng i n t er es t of t h es e i t em s Th e C om pa n y u s es th i s m e as ur e i n t er n al l y t o ev a l ua t e o ur unde r l y i ng ope r a t i ng pe r f or m anc e f or th e r e por t i ng pe r i ods p r es en t ed and t o a s si st wi t h t he pl a nni ng and f or ec a s t i n g of f u t ur e ope r a t i ng r es ul t s B ar r i c k b el i ev es t h at a dj u s t ed net e ar ni ngs is a us ef u l m eas u r e of ou r pe r f or m anc e be c aus e t h es e adj u s t i ng i t em s do n ot r ef l ec t t he unde r l y i n g o p er at i ng pe r f or m anc e of o ur c or e m in in g bu s i nes s and ar e n ot n e ce ssa r i l y i n di c at i v e of f ut ur e ope r at i ng r es u l t s A dj us t e d n et ea r ni n gs and a dj u s t ed n et e ar ni n gs p er s h ar e ar e i nt en d ed t o pr o v i de ad di t i ona l i nf or m a t i on o nl y and do not h av e any s t anda r di z e d m ea ni ng unde r I F RS and m ay n ot be c o m par a bl e t o s im il a r m ea s u r es of pe r f or m anc e pr es en t ed by ot h er c om p an i es T h ey s h oul d no t be c ons i de r e d in i s ol at i on or as a s u b s ti tu t e fo r m ea s ur es of pe r f o r m anc e pr ep a r ed in ac c or d anc e w i th I F RS F or f ur t he r d et ai l s on t h es e non G AAP m eas u r es pl e as e r ef er t o p age 79 80 of t he MD A ac c om pany i ng B a r r i ck s f i r st quar t e r 2020 f i nanc i al s t a t e m e n t s f ile d on SED AR at www s e dar c om and on ED G AR at ww w s ec gov 6 Co s t of s a l es app l i c ab l e t o go l d p er oun c e is c al c ul at e d us i n g c o st of s a l es app l i c ab l e t o go l d on an at t r i bu t ab l e bas i s re mo v i n g t he non c on t r ol l i ng i n t er es t of 38 5 of N e v ada G ol d M i n es i nc l ud i ng 63 1 of S out h A rt u ro 40 P ue bl o V i ej o 20 of Lou l o G o unk o t o 10 3 of T ong o n and 16 of No r t h M ar a B ul y an h ul u and B uz w agi f r om co s t of s al es a nd i nc l ud i ng o ur pr op or t i o nat e s har e of c o st of s al es at t r i b ut ab l e t o ou r e qui t y m e t hod i n v es t m ent s in K ib a li a nd Mo ri l a di v i de d by at t r i b ut a bl e g ol d ounc e s so l d C o st of s al es ap pl i c ab l e t o c op p er p er p ound is c a l c ul at ed us i ng c o st of s al es ap pl i c ab l e t o c op p er i nc l ud i ng our pr opor t i ona t e s h ar e of c o st of s al es at t r i but a bl e t o our e qui t y m e t hod i n v es t m en t s in Z al di v ar and J abal S ay i d di v i de d by c ons ol i dat e d c oppe r pounds s ol d i nc l udi n g our pr opor t i onat e s har e of c oppe r pounds s ol d f r om our e qui t y m e t hod i n ve st m e n t s 7 T o t al ca sh c o st s p er ounc e and Al l in s us t ai ni n g c o st s per ounc e ar e non G AAP f i nan c i al pe r f or m a nc e m ea s u r es T o t al c a sh c o st s p er oun c e s t a r t s wi t h c o st of s al es app l i c a bl e t o g ol d pr o d uc t i o n b ut ex c l u d es t he i m pac t of de pr e c i a t i on t he non c on t r ol l i ng i nt er es t of c o st of sa l e s an d i nc l ude s by pr oduc t c r ed i t s Al l in s u s t ai ni n g c o st s p er oun c e be gi n wit h T ot al ca sh c o st s p er oun c e and add f ur t he r c o st s w hi c h r ef l ec t t he add i t i o nal co st s of o pe r at i ng a m i n e p ri ma ri l y s u s t ai ni n g c a pi t al e x p endi t ur e s s u s t ai ni n g l ea s es ge ne r al a dm i ni s t r at i v e co s t s m i n es i t e ex p l o r at i on a nd e v al u at i on c o st s an d r ec l am a t i o n co st a c c r et i on a nd am or t i z a t i o n B ar r i c k b el i ev es t h at t he us e of t o t al ca sh co st s p er ou nc e and al l in s u s t ai ni n g c o st s p er ounc e wi l l a s si st i nv e s t or s ana l y s t s an d ot h er s t ak e hol de r s in unde r s t and i ng t he co s t s as s o c i at ed wi t h p r oduc i ng g ol d u nde r s t a ndi ng t he ec o n om i c s of g ol d m i ni n g a sse ssi n g our ope r at i ng pe r f or m a nc e and al s o our a b i li t y t o ge ne r at e f r ee ca sh f l ow f r om c u rre n t ope r a t i ons a nd t o ge ne r at e f r ee ca sh fl o w on an o v er al l C om p a ny bas i s T ot al ca sh c o st s p er ounc e and Al l in s u s t ai ni n g co st s p er oun c e ar e i nt en d ed to p r ov i de a ddi t i ona l i nf o r m at i on onl y and do not hav e a ny s t a n d ar di z ed m e ani ng unde r I F RS A l t hou gh a s t a n d ar di z ed de f i ni t i on of al l in s us t a i ni ng c o st s w as publ i s he d in 201 3 by t he W or l d G ol d Co u n c il a m ar k et d ev el o pm ent or ga ni z at i on f or t he g ol d i ndus t r y c om p r i s ed of and f unde d by 25 g ol d m in in g c om p a ni es f r om ar ou nd t he w or l d i nc l ud i ng B a r ri c k it is n ot a r e gul at o r y or gan i z at i on and ot h er c om pa n i es m ay ca l cu l a t e t hi s m ea s ur e d i f f e r e n t l y S t a r t i ng f r om t he f i r st qu a r t er of 2 019 we hav e r en am ed ca sh co s t s to t ot al ca sh co s t s w h en re f e rri n g t o our gol d ope r a t i ons Th e c al c ul at i on of t o t a l ca sh c o st s is i de nt i c al t o o ur pr e v i ous c al c ul at i o n of c as h c o st s wit h o nl y a c h ange in t he n am i ng c onv e nt i on of t hi s n on G AAP m ea s ur e Th e s e m ea s u r es s hou l d n ot be c o ns i d er ed in i s ol at i on or as a s u b s ti tu t e f or m ea s ur es pr e par e d in a c c o r danc e wit h I F RS F or f ur t he r de t ai l s on t h es e non G AAP m ea s ur es pl ea s e r ef er t o pa g es 81 92 of t he MD A ac c o m pa ny i ng B ar r i c k s fi r s t q u ar t er 2020 f i nanc i a l s t a t e m e n t s f i l ed on SED AR at www s e dar c om and on ED G AR at www s ec gov