Товар коштував 100 грн. Спочатку ціну на товар підвищили на 20 %, а потім двічі знижували, причому кожного разу на 10 %. Скільки став після цього коштувати товар?

I have asked myself a lot of times: "What do i want to be when i leave school?" As the most of my friends i am going to enter the university. 
I think when i grow up I will be a doctor. In my mind, this is a most important profession in the world. The professional of doctors gives me plenty of opporunites to help people in trouble. 
When i grow up, i'll get married at 21-22 years and i will have 1 child and 1 big and white dog. I'll be live in a small town near the sea and read lots of books.
That's how I see my future.