viarno reshenie mobile operator

function mobileOperator(input) {
    let period = input[0];
    let type = input[1];
    let internet = input[2];
    let months = Number(input[3]);
    let tax = 0;

    if(type === "Small") {
        if(period === "one") {
            tax = months * 9.98
        } else {
            tax = months * 8.58;
        }
        if(internet === "yes") {
            tax += months * 5.50;
        }
    } else if(type === "Middle") {
        if(period === "one") {
            tax = months * 18.99
        } else {
            tax = months * 17.09;
        }
        if(internet === "yes") {
            tax += months * 4.35;
        }
    } else if(type === "Large") {
        if(period === "one") {
            tax = months * 25.98
        } else {
            tax = months * 23.59;
        }
        if(internet === "yes") {
            tax += months * 4.35;
        }
    } else if(type === "ExtraLarge") {
        if(period === "one") {
            tax = months * 35.99
        } else {
            tax = months * 31.79;
        }
        if(internet === "yes") {
            tax += months * 3.85;
        }
    }
if(period === "two") {
    tax = tax - tax * 0.0375;
}
console.log(`${tax.toFixed(2)} lv.`);
}