Christmas_Preparation

function christmasPreparation(input) {

    let paper = 5.80;
    let plat = 7.20;
    let glue = 1.20;

    let paperCount = Number(input[0]);
    let platCount = Number(input[1]);
    let glueLiters = Number(input[2]);
    let discountPercent = Number(input[3]);

    let total = (paperCount * paper) + (platCount * plat) + (glueLiters * glue);
    let discountAmount = (total * discountPercent) / 100;
    total -= discountAmount;

    console.log(total.toFixed(3));
}

christmasPreparation(["4",
    "2",
    "5",
    "13"])