code: def get_products_size(products):
          
          size_total = 0
          for title, props in products.items():
              size_product = props["size"]
              size_value = float(size_product.split(" ")[0])
              size_unit = str(size_product.split(" ")[1])
              if size_unit == "MB":
                  size_value /= 1024.
              if size_unit == "KB":
                  size_value /= 1024. * 1024.
              size_total += size_value
          return round(size_total, 2)
docs: Return the total file size in GB of all products in the OpenSearch response.