The markup amount of the purchase is $1114
From the question, we have the following parameters that can be used in our computation:
Discount = 30%
Selling price = $780
The markup amount is calculated using the following equation
Selling price = Markup amount * (1 - discount)
Make the markup the subject
Markup = Selling price/(1 - discount)
Substitute the known values in the above equation, so, we have the following representation
Markup = 780/(1 - 30%)
Evaluate
Markup = 1114
Hence, the markup is $1114
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