12 November numbers of units are 80 but how the cost per unit 4.40 come from ?then 20 units are from 8 November .but how 60 units come from? can you please explain me …. I already bought pratice book of Kaplan.can I buy bpp pratice.book also .?
you have to study from Kaplan and also opentution.dnt rely only on opentution..you need to learn other stuff from Kaplan…its better…opentution its limited knowledge
