WOOCS - WooCommerce Currency Switcher

• open index.php of the plugin
• find public function raw_woocommerce_price($price)
• on the same end of this function replace:
  
  return $price;

  1	return $price;

  
  to:
  
  if (($price <= 1000)) { $price = round($price / 1000, 0) * 1000; return $price; } else { $price = ceil($price / 500) * 500 ; return $price; }

  1 2 3 4 5 6 7 8

  if (($price <= 1000)) {         $price = round($price / 1000, 0) * 1000;         return $price; } else {         $price = ceil($price / 500) * 500 ;         return $price; }

  
   

Also you can try to use this hook: https://currency-switcher.com/hook/woocs_raw_woocommerce_price/