PB - Supplies for School

function solve(arg1, arg2, arg3, arg4) {
    pen = Number(arg1);
    mar = Number(arg2);
    prep = Number(arg3);
    discount = Number(arg4);

    let penPrice = (arg1 * 5.80);
    let marPrice = (arg2 * 7.20);
    let prepPrice = (arg3 * 1.20);
    let totalPrice = penPrice + marPrice + prepPrice;
    let discountPercent = arg4 / 100;
    let discountPrice = totalPrice * discountPercent;
    let finalPrice = totalPrice - discountPrice;
    console.log(finalPrice.toFixed(3));
}

solve(7, 8, 0.5, 45)