Selina walked into her final stop for the day, after the longest day of school shopping she had ever done. After buying her necessary items like clothes, quills, books, and cauldrons and buying her not so necessary items like joke shop goods, beauty supplies, and quidditch supplies Selina entered wiseacres. All of the final tidbits of shopping was to be done here. Of course looking at the young first year the only indication of her long shopping day was in her exhausted expression. The rest of the evidence was hidden away in a small bag resting on her arm. The whole of her purchases lay in the bag with a heavy expansion charm on it placed by her mother.
As Selina looked around the shop she gathered all of the supplies that she was finally allowed to buy. Previous to Hogwarts her parents were weary to lend her their magical objects. Finally she would have her own to claim for herself.
Softly as she could Selina approached the store clerk. The woman seemed pleasant enough and quite engrossed in her work. So as quickly and quietly as she could muster she began to pile all of her goods on the counter for purchasing once the clerk was prepared.
Selina diligently put one anti-burglary buzzer, a fanged frisbee, a new wizard's chess set, a magical trunk that exuded Gryffindor spirit, and a pensieve on the counter plus her very own invisibility cloak and deluminator. She was enthralled with the story of the golden trio and how they brought the longest lasting peace in wizard history upon the world. Therefore she needed similar supplies to what they had to be great Gryffindors.
While the clerk was still busy Selina began to do the math of all of her purchases in her head. She calculated 25 galleons and 33 sickles. Still as softly as she could she took out the money and placed it plus and extra few sickles on the counter. Selina then awaited the girl to look up.
After several seconds of waiting the girl finally looked up and saw Selina. Selina smiled and said, "I saw you were busy so I just thought I'd give you your time. I rang up my supplies for you too. It came out to 25 galleons and 33 sickles. If you want to check go ahead. Sorry for not warning you sooner."