Sir that's not at all cheap.
I just wanted to get this answer
Pakhweels 500ml apc is around 800pkr which means 1600 for a litre
Whereas koch chemie mzr which is also an apc costs 3000pkr for a litre.
This 1 litre of apc can be diluted 1:20 and hence form around 20ltr in 3000pkr.
So 2 ltr of pw apc or 20 ltr of german certified koch chemie apc in same price
Choice is yours