document.write( "Question 56212: A drug store buys 2,000 rolls of Christmas paper for $3.00 per roll. It is expected that 10% of the paper will eventually be sold for $2.25 per roll. If the store wishes to make a gross profit of 50% on cost, what should be the marked price of a roll of paper?
\n" ); document.write( "
\n" ); document.write( " a. $4.50
\n" ); document.write( " b. $6.67
\n" ); document.write( " c. $4.75
\n" ); document.write( " d. $3.75
\n" ); document.write( "
\n" ); document.write( " \n" ); document.write( "
Algebra.Com's Answer #38149 by ankor@dixie-net.com(22740)\"\" \"About 
You can put this solution on YOUR website!
A drug store buys 2,000 rolls of Christmas paper for $3.00 per roll. It is expected that 10% of the paper will eventually be sold for $2.25 per roll. If the store wishes to make a gross profit of 50% on cost, what should be the marked price of a roll of paper?
\n" ); document.write( ":
\n" ); document.write( "Total cost of the paper: 2000 * 3 = $6000
\n" ); document.write( ":
\n" ); document.write( ".10 * 2000 = 200 rolls will be sold at $2.25,
\n" ); document.write( "Revenue from these: 200 * 2.25 = $450
\n" ); document.write( ":
\n" ); document.write( "To make 50% on the cost: .5 * $6000 = $3000
\n" ); document.write( ":
\n" ); document.write( "Let x = price required to make 50% profit
\n" ); document.write( ":
\n" ); document.write( "x(2000 - 200) + 450 - 6000 = 3000
\n" ); document.write( "1800x - 5550 = 3000
\n" ); document.write( "1800x = 3000 + 5550
\n" ); document.write( "1800x = 8550
\n" ); document.write( "x = 8550/1800
\n" ); document.write( "x = $4.75
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( " \n" ); document.write( "
\n" );