normal cost of normal production need to be found out first......
normal prodcustion = 98% ,scrap value of norma loss = 20*(2/8)= 5 rs
therefore normal cost of normal production = 1000 - 5 = 995 rs ( i.e cost of 98% normal output)
abnormal loss output = 8-2 = 6%
value of abnormal loss = 995 * ( 6 / 98) =61 rs
but scrap realisation of abnormall loss = 20 - 5 = 15 rs
therefore
abnormal loss charged to P&L is = 61 - 15 = 46 rs
normal loss has no individual recognition in ascertaining profit or loss it is absorbed by output...
this is the way to follow as per cost accoutning stnadards.......