The Ashland High School Science Department is purchasing new earth science and physics textbooks this year. Ms. Eaton has requested 97 earth science textbooks and 71 physics textbooks for all of her classes, which costs the department a total of $ 7,624. Mr. Newman has asked for 95 earth science textbooks and 93 physics textbooks , which will cost a total of $8,640 . How much do the textbooks cost ?