post samples in india market, need india local people only, better in Surat

I have plastic film in sheet which is our company product, i also have the post address and all the informations , i need to post our samples to 15 customers , the post will be very light , not over than 0.5kgs , so pls give me an idea price, how much i need to pay 15 post from your city to surat city and how much i have to pay for your help/commission , thanks! india local people only pls!!!!