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Part 1
A department store buys100 shirts at a cost of $1,800 and sells them at a selling price of $20 each. Find the percent markup.
The cost of 100 shirts is $1,800, so the cost per shirt is $1,800 / 100 = $18.
The selling price per shirt is $20.
The markup is the difference between the selling price and the cost, which is $20 - $18 = $2.
The percent markup can be found by dividing the markup by the cost and multiplying by 100:
Percent Markup = ($2 / $18) * 100 = 11.11%
Therefore, the percent markup is 11.11%.