Gokul Milk — vendor demands more price than mrp

Address:

R.N.203, SAI LEELA APT, AT POST KALHER,TAL. BHIWANDI, DIST. THANE, Thane, Maharashtra, 421 302

I am pranay patil i stay in kalher dist. Thane i see so many days when i go to buy gokul milk the origianl price of half litter packet has 28 rupees on mrp but shopkeeper demand more money then mrp shopkeeper demand extra 2-3 rupees per half litter packet so on mrp the price of half litter milk has 28 rupees nut shopkeeper demands 30-31 rupees and says rate are increase but in actual only cow milk price are hike not an pasterurised full cream milk
So why we pay more money so please interfere in that topic.
Thane you