document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1168057>Question 1168057</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Hi\r<BR>\n" );
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document.write( "For every book  bob sells he will make 12 dollars. He will. Get another 5 dollars for every set of 10 books he sells. If he sells 100 books he will get a 50 dollar bonus . How many books did he sell to make 1372 dollars.\r<BR>\n" );
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document.write( "Thanks </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #792669 by </B><A HREF=/tutors/aboutme.mpl?userid=greenestamps><B>greenestamps(13203)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=greenestamps><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=greenestamps><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=792669\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <br><BR>\n" );
document.write( "His income from selling the books is not linear; but it is always increasing.  So, as the other tutor suggests, the easiest way to solve the problem is just to make a reasonable guess and work from there.<br><BR>\n" );
document.write( "He gets $1200 for selling 100 books, not counting the bonuses.  Since that is a bit less than the total he makes including bonuses, let's find his total income, including bonuses, for selling 100 books.<br><BR>\n" );
document.write( "$12 * 100 = $1200  ($12 for each book)<BR>\n" );
document.write( "$5 * 10 = $50  ($5 bonus for each group of 10 books)<BR>\n" );
document.write( "$50 *1 = $50  ($50 bonus for selling 100 books)<br><BR>\n" );
document.write( "Total: $1300<br><BR>\n" );
document.write( "Since he made $1372, we know the number of books he sold was more than 100.  So our guess of 100 books was a good starting place.<br><BR>\n" );
document.write( "The difference between the $1372 he made and the $1300 he makes for selling 100 books is $72.<br><BR>\n" );
document.write( "That is what he makes for selling $72/$12 = 6 books; and he won't get any additional bonuses for selling 6 more books after the first 100.<br><BR>\n" );
document.write( "So the number of books he sold is 106.<br><BR>\n" );
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