Homework Help: math

Posted by briana on Saturday, June 30, 2012 at 7:13pm.

A stationery retailer generally prices portable computers using a 30 percent markup. The retailer expects to sell 100 portable computers at the 30 percent markup. How many units would it have to sell at a 10 percent increase in price from the original price to maintain the same gross profit?

math - MathMate, Saturday, June 30, 2012 at 7:50pm
Let the original cost price be 1000.
100 computers at 30% markup brings a profit of 100*(1000*30%)=30000

If the original price goes up 10% (cost =1100), the new profit per computer is 1300-1100=200

Number computers required to maintain the same total profit
= 30000/200=150

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