あるものが持つコスト（費用）とパフォーマンス（効果）を対比させた度合い。費用対効果や対費用効果ともいう。
アウトドアブランドDOD（ディーオーディ）の人気アイテムもプライスダウン
209万8800円とお買い得感が高く、ファーストカーとして十分なサイズ
JALのクラスJは普通席より快適な座席で移動できるというコンセプト
お金持ちキャラの家の部屋ほど、ものが少ないということに気がつくそう
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