They made Rs 267/-. They learned that had they arranged the paper properly they could have got more.. That guy segregated and considered all the crushed paper as waste.
They did Maths at the shop.
They asked questions like "Why are you not taking these papers?" "Why are you segregating?" "How much per kg costs?" "Where do the waste go?"
They checked weight and calculated the amount also.
So, our kids have been discussing that next time we should not dump the papers into the bin.