Back To The Past 100/100

function backToThePast(input) {
    let inheritedMoney = Number(input[0]);
    let lastYear = Number(input[1]);
    let age = 18;

    let spentMoney = 0;
    for (let i = 1800; i <= lastYear; i++) {
        let currentAge = age++;
        if (i % 2 === 0) {
            spentMoney += 12000;
        } else {
            spentMoney += 12000 + 50 * currentAge;
        }
    }
    if (inheritedMoney >= spentMoney) {
        console.log(`Yes! He will live a carefree life and will have ${(inheritedMoney - spentMoney).toFixed(2)} dollars left.`);
    } else {
        console.log(`He will need ${(spentMoney - inheritedMoney).toFixed(2)} dollars to survive.`);
    }
}