Currency equivalent ?

I have been noticing for couple of years now....and have been a victim of the same as well on being thrown into the new world of currency!! I have seen this happen at railway stations , office cafeteria , tea stalls , Toll booths ( on Kannur tellicherry road)...and the list is endless. However when you give them back with the same equivalent they refuse to accept it. Absurd!! I had to make a lot of noise at one of the cafeteria to make them accept back what they gave me..

Wondering what the news equivalents are ??

Hail Eclairs , Halls and peanut chickies!!

BTW....how is the Dollar value calculated for these ?