いくら

この かばん は いくら ですか。

The correct answer is `いくら` (ikura). This interrogative word means "how much." It correctly precedes `ですか` (desu ka), which forms a polite question. So, `いくらですか` means "How much is it?" This fits perfectly to ask for the price of the bag. `かばん` (bag) is the noun and should follow `この` and precede `は`. `は` is the topic particle and should follow `かばん`. `ですか` is the polite question ending and is already correctly positioned at the end of the sentence. *Grammar Tip:* Use `いくらですか` to politely ask for the price of something. Example: このペンはいくらですか (How much is this pen?).

正解は「いくら」。「いくらですか」で質問文に。「かばん」は「は」の前。「は」は助詞。「ですか」は文末。 文法：「～はいくらですか」で値段を尋ねます。