The coupon would make the unit rate / price per item change because a coupon would bring down the price of the price all together so it would also bring down the price of the price per item.

Le coupon ferait changer le taux unitaire/prix par article parce qu'un coupon ferait baisser le prix du prix ensemble, de sorte qu'il ferait aussi baisser le prix du prix par article.

Hi ! est-ce que vou voulez voyager en france ? (do you want to travel to france ? )b- oui, je veux y voyager. ( yes, i want to travel there)"y" usaually replace a place have to use it in front of the verb to which it refers (here, it's "voyager")"en" is more likely to refers to as "j'en voudrais une part" =" i would like a piece of it""je lui en ai parlé" = i spoke to him/her about itwel, of course, as in french grammar, many exceptions ! hope i !