ボックス:Box

に:A particle, direction. in this case, “into”

入れた:[verb] past tense of the verb, 入れる, to put things into something

物(もの):thing

は、:a particle, subject marker (after the subject)

返却(へんきゃく):[noun] return

できません:cannot do

カブ:is a name of vegetable, and at the same time, it is a stock.

高額(こうがく):High price

買取(かいとり):purchacing

店内(てんない):Inside the shop

のみ:only

の:a particle, noun connecter

取(と)り扱(あつか)い:[noun] (products) handling, dealing