Clever Lily

function cleverLily(input){
    let age = Number(input[0]);
    let washingMachinePrice = Number(input[1]);
    let toyPrice = Number(input[2]);

    let evenSum = 0;
    let totalEvenSum = 0;
    let brotherMoney = 0;
    let toys = 0;

    for (let i = 1; i <= age; i++){

        if (i % 2 === 0){
            evenSum += 10;
            totalEvenSum += evenSum;
            brotherMoney += 1;
        } else {
            toys ++;
        }
    }
    let totalBirthdaySum = totalEvenSum + toys * toyPrice - brotherMoney;
    if (totalBirthdaySum >= washingMachinePrice){
        console.log(`Yes! ${(totalBirthdaySum - washingMachinePrice).toFixed(2)}`);
    } else {
        console.log(`No! ${(washingMachinePrice - totalBirthdaySum).toFixed(2)}`);
    }
}