small shop

function smallShop(input) {

    let product = input[0];
    let city = input[1];
    let amount = +input[2];
    let answer = 0;
    if (city === 'Sofia') {
        switch (product) {
            case 'coffee': answer = amount * 0.50; break;
            case 'water': answer = amount * 0.80; break;
            case 'beer': answer = amount * 1.20; break;
            case 'sweets': answer = amount * 1.45; break;
            case 'peanuts': answer = amount * 1.60; break;
        }
    }
    if (city === 'Plovdiv') {
        switch (product) {
            case 'coffee': answer = amount * 0.40; break;
            case 'water': answer = amount * 0.70; break;
            case 'beer': answer = amount * 1.15; break;
            case 'sweets': answer = amount * 1.30; break;
            case 'peanuts': answer = amount * 1.50; break;
        }
    }
    if (city === 'Varna') {
        switch (product) {
            case 'coffee': answer = amount * 0.45; break;
            case 'water': answer = amount * 0.70; break;
            case 'beer': answer = amount * 1.10; break;
            case 'sweets': answer = amount * 1.35; break;
            case 'peanuts': answer = amount * 1.55; break;
        }
    }
    console.log(answer);
}