Your school magazine asked its readers to send in short stories

Я не знаю как писать в виде ОГЭ (Явно что это письмо неформальное, и имя получателя не указано, поэтому пишу чисто как историю).

Once I was going shopping. My mom asked me to buy few products: Flour, strawberries and milk. She wanted to make a pie.

I went to my local shop. I had a notebook where I have written all of my products. When I came, I was looking for stawberries for a long time! I couldnt really find them, because most of them were too bad. But suddenly Ive found a basket with fresh strawberries. Also, I had problems with milk: There were no import of milk, so I was really disappointed. But when I was finding flour, Ive found one package of milk.

After all, I came to the cashbox, and then after having a total bill, I realized that Ive left all my money at my pocket, which Ive left on a sofa. This was the most annoying thing in my life! I came home faster, and brought it with me, and finally Ive paid all my bill and took the products.