function prices(produkt, town, quantity) {
    let price = 0;
    quantity = Number(quantity);
        switch (town) {
            case "Sofia":
                switch(produkt) {
                case "coffee":
                    price = quantity * 0.50;
                    break;
                case "water":
                    price = quantity * 0.80;
                    break;
                case "beer":
                    price = quantity * 1.20;
                    break;
                case "sweets":
                    price = quantity * 1.45;
                    break;
                case "peanuts":
                    price = quantity * 1.60;
                    break;
            }
         break;
            case "Plovdiv":
        switch (produkt) {
            case "coffee":
                price = quantity * 0.40;
                break;
            case "water":
                price = quantity * 0.70;
                break;
            case "beer":
                price = quantity * 1.15;
                break;
            case "sweets":
                price = quantity * 1.30;
                break;
            case "peanuts":
                price = quantity * 1.50;
                break;
        }
           case "Varna":
        switch (produkt) {
            case "coffee":
                price = quantity * 0.45;
                break;
            case "water":
                price = quantity * 0.70;
                break;
            case "beer":
                price = quantity * 1.10;
                break;
            case "sweets":
                price = quantity * 1.35;
                break;
            case "peanuts":
                price = quantity * 1.55;
                break;

        }
    }
}

console.log(prices);