How can I sum values which are coming from web api in foreach loop? Javascript

Why can not I sum prices in foreach loop that I wrote for web api service? It takes only last price for last index bills.bills[6].price

export class BillManager {
    async updateBill(className) {
        const billService = new BillService();
        const bills = await billService.get();

        bills.bills.forEach((parameter, index) => {
            var total=0;
            total += bills.bills[index].price;
            price.innerHTML = "<b>" + "Total: " + total + "EUR" + "</b>";
});

This gives 5EUR output. It is the last index's price.