【Skill 2】Find expressions such as ご注文につき (for each order) and お買い上げごとに (for each purchase)
To understand how to get stamps, find the following expressions. You will receive a stamp for purchasing products such as those mentioned before these expressions.
■ ご注文につき (for each order)
■ お買い上げごとに (for each purchase)
■ お買い上げ毎に (for each purchase)