That counting spatula has gone missing again; has it slipped behind the tray?

How to say “That counting spatula has gone missing again; has it slipped behind the tray?” in Japanese

In Japanese

計数用(けいすうよう)ヘラがまた見当(みあ)たらないんだけど、トレーの後(うし)ろに落(お)ちてない？

Keisūyō hera ga mata miataranai n da kedo, torē no ushiro ni ochitenai?

That counting spatula has gone missing again; has it slipped behind the tray? in other languages