Weegy: $47.50+34.00=$81.50. The selling price of the shirts is $81.50. Thanks for asking Weegy! User: What is the percent markup based on cost for the shirts in the previous question? (Round percent to the nearest tenth.) Weegy: (81.50-47.50/47.50*100=71.6. The percent markup based on cost for the shirts is 71.6%. (More)

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