chekout page php error

Hi I am facing a problem with edd checkout page.

i need to add a custom currency, but after that, a php warning shown top of checkout page.

message is:
Warning: A non-numeric value encountered in E:\xampp\htdocs\w\wp-content\plugins\temify.php on line 552

line 552 refer to this code: $price = @$price/10000;

all my custom currency code is:

if ( ! function_exists( 'edd_htoman_currency' ) ) {
	function edd_htoman_currency( $formatted, $currency, $price ) {
		if ( ! is_admin() ) {
			$price = @str_replace( edd_get_option( 'thousands_separator', ',' ), '', $price );
			$price = @$price/10000;
			$price = number_format( $price, 0, '', ',' );
			return $price . ' ?????????';
		}
		return $price . ' ????';
	}
}
add_filter( 'edd_rial_currency_filter_after', 'edd_htoman_currency', 10, 3 );
add_filter( 'edd_rial_currency_filter_before', 'edd_htoman_currency', 10, 3 );

i think this error is from PHP 7.1.7 that i am using.