Bike Race 100/100

function bikeRace(input) {
    let juniors = Number(input[0]);
    let seniors = Number(input[1]);
    let route = input[2];

    let fee = 0;
    if (route === "trail") {
        fee = juniors * 5.50 + seniors * 7;
    } else if (route === "cross-country") {
        fee = juniors * 8 + seniors * 9.50;
    } else if (route === "downhill") {
        fee = juniors * 12.25 + seniors * 13.75;
    } else {
        fee = juniors * 20 + seniors * 21.50;
    }
    if (route === "cross-country" && (juniors + seniors) >= 50) {
        fee = fee - fee * 0.25;
    }
    let costs = fee * 5 / 100;
    let donation = fee - costs;
    console.log(donation.toFixed(2));
}