Amul / Gcmmf — Higher rate charge at retail counter

Address:

74-A , vegetable society, Vidya Nagar, Bhavnagar Gujarat

Hi,
My name is VISHVAS GOHIL
Address: 74-A Vidya Nagar, Vegetable society Bhavnagar. 364001
Phone : [protected]
[protected]
Email: vishvas.[protected]@gmail.com

I use to buy 200 ml slim and trim milk.
I buy at Gandhi society . There are many retailers at Gandhi society.one of the retailers charge 11 RS per pack of 200 ml slim and trim milk . I therefore start buying from Sindhu Nagar where the charges are 9 RS per pack.
Sindhu Nagar is quite far from my residence.
Can you tell me which is the correct rate ?
And if 9 RS per pack is correct then why the retailer at Gandhi society charge 2 rs more per 200 ml pack ?
Can you stop that retailer robbing innocent people ?
2 rs per 200 ml mean 10 rs per ltr...