Tennis Ranklist JS

function tennisRanklist(input) {
    let tournaments = Number(input[0]);
    let startingPoints = Number(input[1]);

    let totalPoints = 0;

    let wonTournamentsCounter = 0;
    for (let i = 2; i <= tournaments + 1; i++) {
        let stage = input[i];

        if (stage === "W") {
            totalPoints += 2000;
            wonTournamentsCounter++;
        } else if (stage === "F") {
            totalPoints += 1200;
        } else {
            totalPoints += 720;
        }
    }
    let finalPoints = totalPoints + startingPoints;
    let averagePoints = totalPoints / tournaments;
    let percentWonTournaments = wonTournamentsCounter / tournaments * 100;

    console.log(`Final points: ${finalPoints}`);
    console.log(`Average points: ${Math.floor(averagePoints)}`);
    console.log(`${percentWonTournaments.toFixed(2)}%`);
}