Answer:
25%
Explanation:
Step one:
given
number of shirts= 500
cost of all the shirts= $12000
unit cost of shirt= 12000/500
=$24
the selling price = $30
the profit per shirt= selling price-cost price
30-24=$6
Required
% mark up
% mark up=( profit/cost price)*100
% mark up=( 6/24)*100
% mark up=0.25*100
% mark up=25%
Hence the % mark up is 25%