Aysel Hanım exchanged 45 grams of gold on Monday and 30 grams of gold on Tuesday. If she had exchanged 30 grams on Monday and 45 grams on Tuesday, she would have received 60 TL less compared to the first situation.
According to this, by how many TL did the price per gram of gold decrease on Tuesday compared to Monday?\\
A) 4\\
B) 5\\
C) 6\\
D) 9\\
E) 15