Oile Price Go Up RS 3 As Per Liter

The use and pricing of gasoline resulting from factors such as crude oil prices, the strength of the local currency, processing and distribution costs, local demand, local taxes, as well as the availability of local sources of gasoline.

Indian Oil Marketing Companies are getting together to raise oil prices again, cites recent rise in world crude oil prices and the weakening of the rupee against the dollar. On this basis, they argue that if they sell gasoline at the same price to continue until next week, will be their loss in an amount of Rs 3 liters of fuel per plane and therefore the price, as if not wander more.

It's fine, I guess the curse of a free economy and deregulated gas prices.
However, I just ask a question about these oil marketing companies.
Why not reduce the price of fuel last month, when world oil prices had dropped?

Why do they cite the fact that at this point they were still old supply, which fall in prices could not be established, while the recent rise in crude oil prices and the value of the rupee down, will an immediate impact?

Have to understand me, or that these oil marketing companies not to buy oil on the market when prices were or are simply intend to milk the Aam Adami, and with this government which seems hell-bent on pushing us all back in the 90s, when a majority could not afford a regular telephone, let alone a mobile phone...?