A bookseller sold 'a' number of Geography textbooks at the rate of ₹ $x$ per book, 'a+2' number of History textbooks at the rate of ₹ $(x+2)$ per book and 'a-2' number of Mathematics textbooks at the rate of ₹ $(x-2)$ per book. What is his total sale in ₹?

$3x + 3a$

$3ax + 8$

$9ax$

$x^3 a^3$

Kepler. Discussing PYQs. Q.no. 38

A bookseller sold 'a' number of Geography textbooks at the rate of ₹ xxx per book, 'a+2' number of History textbooks at the rate of ₹ (x+2)(x+2)(x+2) per book and 'a-2' number of Mathematics textbooks at the rate of ₹ (x−2)(x-2)(x−2) per book. What is his total sale in ₹?