Ineed forming sentences in french using these. can someone me

Any french speakers? i need some . could someone check the grammar of my french translations? 1. i would get a card for a bookstore. > > > *je voudrais acheter une carte-cadeau pour la librairie en le centre commercial.*2. they would have to go to the bookstore, the jewelry store, and flower shop. > > > ils devraient aller à la librairie, la bijouterie et le fleuriste.3. a good amount to spend would have to be a few hundred dollars. > > > un bon montant à devrait être de quelques centaines de dollars.4. i decide what present i am going to get for a person by thinking about what would be important to them. > > > je décide quel cadeau je vais chercher pour une personne (by thinking about) ce que cela important pour leur.for the 4th question, how would i say "by thinking about" in french? and by the way, i need the french sentences checked, those are what i wrote.

Le marché a bakery for croissants, bread, baguettes 2. le centre commercial a supermarket 3. la boulangerie a mall 4. la boucherie a tobacco, postcard, magazine, candy shop 5. la charcuterie a bookstore 6. le tabac a butcher shop with whole animals, like cows, chickens, and lambs. 7. le grand magasin a meat shop for prepared meats like sausages, ham, etc. 8. l'hypermarché a market 9. la librairie a department store 10. la bijouterie a jewelry shop

In this sentence should the 'de' be 'du'? "non, je ne fais pas de sport."