string town = Console.ReadLine(); //sofia
string product = Console.ReadLine(); // coffee
double quantity = double.Parse(Console.ReadLine()); //2
double price = 0;

if (town == "Sofia")
{
    if (product == "coffee")
    {
        price = 0.50;
    }
    else if (product == "water")
    {
        price = 0.80;

    }
    else if (product == "beer")
    {
        price = 1.20;

    }
    else if (product == "sweets")
    {
        price = 1.45;

    }
    else if (product == "peanuts")
    {
        price = 1.60;

    }
}
else if (town == "Plovdiv")
{
    if (product == "coffee")
    {
        price = 0.40;
    }
    else if (product == "water")
    {
        price = 0.70;

    }
    else if (product == "beer")
    {
        price = 1.15;

    }
    else if (product == "sweets")
    {
        price = 1.30;

    }
    else if (product == "peanuts")
    {
        price = 1.50;

    }
}
else if (town == "Varna")
{
    if (product == "coffee")
    {
        price = 0.45;
    }
    else if (product == "water")
    {
        price = 0.70;

    }
    else if (product == "beer")
    {
        price = 1.10;

    }
    else if (product == "sweets")
    {
        price = 1.35;

    }
    else if (product == "peanuts")
    {
        price = 1.55;
    }
}
Console.WriteLine(price * quantity);