WooCommerce Get Total Sales

<?php

add_action( 'woocommerce_after_register_post_type',  'wan_get_post' );

function wan_get_post() {
  $day = date('w');
  $week_start = date('Y-m-d', strtotime('-'.$day.' days'));
  $week_end = date('Y-m-d', strtotime('+'.(6-$day).' days'));

  $wtd_orders = wc_get_orders(
    [
      'date_paid' => $week_start . '...' . $week_end,
    ]
  );

  $mtd_orders = wc_get_orders(
    [
      'date_paid' => date('Y-m-01') . '...' . date('Y-m-t'),
    ]
  );

  $ytd_orders = wc_get_orders(
    [
      'date_paid' => date('Y-01-01') . '...' . date('Y-m-t'),
    ]
  );

  $wtd_total = 0;
  $mtd_total = 0;
  $ytd_total = 0;

  foreach( $wtd_orders as $order ) {
    $wtd_total+= round( $order->get_total() * 100);
  }

  foreach( $mtd_orders as $order ) {
    $mtd_total+= round( $order->get_total() * 100);
  }
  foreach( $ytd_orders as $order ) {
    $ytd_total+= round( $order->get_total() * 100);
  }

  echo 'Total Weekly Sales: RM ' . number_format($wtd_total/ 100, 2) . '<br>';
  echo 'Total Monthly Sales: RM ' . number_format($mtd_total/ 100, 2) . '<br>';
  echo 'Total Yearly Sales: RM ' . number_format($ytd_total/ 100, 2) . '<br>';
  exit;
}