Can he buy permissible things from a store that sells alcohol?
Question

                In our country there are government stores that sell different kinds of food, household goods, fabric, clothing and cleaning materials in addition to alcohol – Allaah forbid – but the section that sells alcohol is outside the main building and is separate from the other sections. The prices in these stores are much cheaper than the regular market prices. 

My question is: is it permissible to deal with these stores and so on, especially for those who are on limited incomes?.
Praise be to Allah.Allaah has 
    forbidden the drinking of alcohol, and He has also forbidden making it, 
    selling it and buying it, even if it is sold  to non-Muslims. 
It was 
    narrated from Jaabir ibn ‘Abd-Allaah (may Allaah be pleased with him) that 
    he heard the Messenger of Allaah  (peace and blessings of Allaah be upon 
    him) say, during the year of the Conquest when he was in Makkah: “Allaah and 
    His Messenger have forbidden the sale of alcohol, dead meat, pork and 
    idols.” Narrated by al-Bukhaari (1212) and Muslim (1571). 
The scholars 
    of the Standing Committee were asked: 
Is it 
    permissible to deal in alcohol and pork if one is not selling them to 
    Muslims? 
They 
    replied: 
It is not 
    permissible to deal in that which Allaah has forbidden, whether it is food 
    or other things, such as alcohol and pork, even if one is dealing with 
    kaafirs, because it is proven that the Prophet  (peace and blessings of 
    Allaah be upon him) said: “When Allaah forbids a thing, He forbids its 
    price.” And because the Prophet  (peace and blessings of Allaah be upon 
    him) cursed alcohol, the one who drinks it, the one who sells it, the one 
    who buys it, the one who carries it, the one to whom it is carried, the one 
    who consumes its price, the one who squeezes it and the one for whom it is 
    squeezed. End quote. 
Fataawa 
    al-Lajnah al-Da’imah (13/49) 
With regard 
    to what is mentioned in the question about buying other goods from someone 
    who sells alcohol, there is no sin in that. Allaah says (interpretation of 
    the meaning): 
“Allaah 
    has permitted trading”

    [al-Baqarah 2:275]
The Muslims 
    may still buy permissible things from kaafirs and evildoers, even though 
    they also sell haraam things in other places. The Prophet  (peace and 
    blessings of Allaah be upon him) used to buy from the Jews, who consumed 
    riba and consumed people’s wealth unlawfully. 
And Allaah 
    knows best.