Cinema Tickets JS

function cinemaTickets(input) {
    let index = 0;
    let command = input[index];
    index++;

    let studentTickets = 0;
    let standardTickets = 0;
    let kidTickets = 0;


    while (command !== "Finish") {
        let vacantSeats = Number(input[index]);
        index++;

        let ticketType = input[index];
        index++;

        let soldSeats = 0;
        while (ticketType !== "End") {
            soldSeats++;

            if (ticketType === "student") {
                studentTickets++
            } else if ( ticketType === "standard") {
                standardTickets++;
            } else {
                kidTickets++;
            }
            if (soldSeats === vacantSeats) {
                break;
            }
            ticketType = input[index];
            index++;
        }
        let soldSeatsPercentage = soldSeats / vacantSeats * 100;
        console.log(`${command} - ${soldSeatsPercentage.toFixed(2)}% full.`);

        command = input[index];
        index++;
    }
    let totalTickets = standardTickets + studentTickets + kidTickets;
    console.log(`Total tickets: ${totalTickets}`);
    console.log(`${(studentTickets / totalTickets * 100).toFixed(2)}% student tickets.`);
    console.log(`${(standardTickets / totalTickets * 100).toFixed(2)}% standard tickets.`);
    console.log(`${(kidTickets / totalTickets * 100).toFixed(2)}% kids tickets.`);
}