set back + money

set back のあとに金額がついたら、いくらの出費がかさんだ、という意味です。0:08 a regular round-trip ticket from NY to Paris in a tiny economy seat will set you back about $1500 or more.

https://www.youtube.com/watch?v=eTS2WASq65k  2:45 this tour will take you two days and set you back around $600. この「世界金融危機はいかにして起こったのか？」解説ツアーは二日の日程と600ドルの参加費用がかかります。

参考リンク
https://bridge-english.blogspot.com/2020/07/run-you-money.html  run you (money) いくらかかる

練習問題解答
a-1723 sets couples back
a-2567 set you back
a-3414 set me back
a-3538 set you back
a-4448 sets them back
a-7377 set you back $50 (fifty bucks)
a-8055 set you back
a-9984 set you back over $150,000