fonteva-design-guide/force-app/main/default/lwc/pfmOrderTotals/pfmOrderTotals.js

## Dev, Build and Test

import { LightningElement, api, track } from 'lwc';
import "c/utils";
import {arrSum} from "c/utils";

export default class PfmOrderTotals extends LightningElement {
    @api items;
    @api totalLabel = 'Total';
    @api currencyIsoCode;
    @track total;

    connectedCallback() {}

    renderedCallback() {
        if (this.items) {
            this.total = arrSum(this.items,i => i.total);
        }
    }
}