completion of the site on OpenCart-Russian Assembly version 3.0.3.2

tasks:
1. add currency "rubles" in the moment I can show only the dollar, Euro, pound
2. is it possible in the item card to add a second volume of the goods (item: displays the item weight is 1 l, we still have this product to add weight 3l.)
3. CNC does not automatically configured, you need to fix
4. snap mail, social networks: instagram and Vkontakte
5. in the order the item is displayed only cash on delivery, do you need to pay by Bank transfer, credit card through Yandex money and pay country, region English.