Bookman purchased 60 copies of a new book released recently, 10 of which are hardback and sold for $20 each, and rest are paperback and sold for $10 each. If 14 copies were sold and the total value of the remaining books was 660, how many paperback copies were sold?
Choose the correct choice from the following choices
A) 22
B) 24
C) 26
D) 28
E) 30
The bookman had 10 hardback ad  60-10= 
<gadget id="calculator"> 60-10</gadget>
<output>50</output>
50 paperback copies;   14 copies were sold, hence  60-14= 
<gadget id="calculator"> 60-14</gadget>
<output>46</output>
46 copies were left. Let # of paperback copies left be p then 10p+20(46-p)=660 --&gt; 10 p=260 --&gt; p=26   # of paperback copies sold is 50-26= 
<gadget id="calculator">50-26</gadget>
<output>24</output>
24   Answer: 24
<result>B</result>
Bookman purchased 60 copies of a new book released recently, 10 of which are hardback and sold for $20 each, and rest are paperback and sold for $10 each. If 14 copies were sold and the total value of the remaining books was 660, how many paperback copies were sold?