Cinema stars JS

function movieStars(input){
let index = 0;
let startingBudget = Number(input[index]);
let totalBudget = Number(input[index]);
index++;
let actorName = input[index];
let payment = 0;

let totalPayment = 0;

while(actorName !== "ACTION") {

    if(actorName.length > 15) {
        payment = ((totalBudget / 100) * 20);
    } else if(actorName.length <= 15) {
        index++;
        payment = Number(input[index]);
    }
    totalPayment += payment;
    totalBudget -= payment;
    if(totalBudget < 0) {
    break;
    }
    index++;
    actorName = input[index];
}

if(startingBudget >= totalPayment) {
    let leftMoney = startingBudget - totalPayment;
    console.log("We are left with " + leftMoney.toFixed(2) + " leva.");
} else if(totalPayment > startingBudget) {
    let neededMoney = totalPayment - startingBudget;
    console.log("We need " + neededMoney.toFixed(2) + " leva for our actors.");
}
}