Easter Party

function easterParty(input) {
    let guests = Number(input[0]);
    let cover = Number(input[1]);
    let budget = Number(input[2]);

    let cake = budget * 0.10;

    if (guests >= 10 && guests <= 15) {
        cover -= cover * 0.15;
    } else if (guests > 15 && guests <= 20) {
        cover -= cover * 0.20;
    } else if (guests > 20) {
        cover -= cover * 0.25;
    }
    let costs = guests * cover + cake;
    if (budget >= costs) {
        console.log(`It is party time! ${(budget - costs).toFixed(2)} leva left.`);
    } else {
        console.log(`No party! ${(costs - budget).toFixed(2)} leva needed.`);
    }
}