**Algebra | CSAT 2019 | Daily Dose of Solved Questions Sep 18 | Civil Services Prelims UPSC | IAS | CSAT MANTRA**

A bookseller sold number of Geography textbooks at the rate of Rs. per book, number of History textbooks at the rate of Rs.per book and number of Mathematics textbooks at the rate od Rs. per book. What is the total sale in Rs.?