document.write( "Question 584692: Lina bought CDs at $5 each and sold them at $8 each. To promote sales, all customers who bought 2 CDs were given 1 free CD. After she had sold all her CDs, Lina made a profit of $660 despite giving away 120 CDs to her customers. How many of Lina's customers bought only one CD? \n" ); document.write( "

Algebra.Com's Answer #372848 by richwmiller(17219) $\"\"$ $\"About$

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240 sold
\n" ); document.write( "240*8=$1920 received
\n" ); document.write( "120 given away
\n" ); document.write( "360 *5=1800 cost
\n" ); document.write( "1920-1800=120 profit on selling 240 and giving away 120 CDs.
\n" ); document.write( "She made one dollar profit on the deal of giving away one for every two sold.
\n" ); document.write( "cost 15 for the three cds and received 16 for two sold
\n" ); document.write( "profit 16-15=1 dollar.
\n" ); document.write( "So she must have made 540 profit on the singles.
\n" ); document.write( "660-120=540 profit on single CDs.
\n" ); document.write( "She made a profit of three dollars on each single cd.
\n" ); document.write( "540/3=180 singles sold
\n" ); document.write( "180*3=540
\n" ); document.write( "360=240+120 (240 sold and 120 given away)
\n" ); document.write( "240+120+180=540 sold or given away\r
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