Movie Stars

function movieStars(input) {
    let budget = Number(input[0]);
    let index = 1;
    let command;

    while ((command = input[index++]) !== "ACTION" && budget >= 0) {
        if (command.length > 15) {
            budget *= 0.8;
        } else {
            budget -= Number(input[index++]);
        }
    }

    if (budget >= 0) {
        console.log(`We are left with ${budget.toFixed(2)} leva.`);
    } else {
        console.log(`We need ${Math.abs(budget).toFixed(2)} leva for our actors.`);
    }
}