Sandy bought 65 books for $1080 from one shop and 55 books for $840 from another shop. What is the average price that Sandy paid per book? Choose the correct choice from the following choices:
A) $14
B) $16
C) $18
D) $20
E) $22
average price per book = (1080 + 840) / (65 + 55) = 1920 / 120= 
<gadget id="calculator">1920 / 120</gadget>
<output>16</output>
$16   The answer is $16.
<result>B</result>
Sandy bought 65 books for $1080 from one shop and 55 books for $840 from another shop. What is the average price that Sandy paid per book?