You can stay in the cart, can't you? / You don't need to get out, do you?
Do you want to get out now?
Oh well, never mind. / Come on then, out you get!
「お買い物カートにまだ乗ってればいいでしょ」= You can stay in the cart, can't you? / You don't need to get out, do you?
「もう降りたいの?」= Do you want to get out now?
「しかたないねぇ」= Oh well, never mind. / Come on then, out you get!
ボキャブラリー
stay = そのままにいて
cart = カート (イギリス英語の場合、trolleyになります)
don't need to get out = 降りなくていいでしょう?
get out = 降りる
Come on then, out you get! = はい、はい、おりましょうね。(しかたないね!というニュアンスで言うセリフ!)