The mark up percentage of each order is 400%
How to determine the percentage mark up?
The given parameters are:
Cost price = $4
Selling price = $20
The mark up percentage is calculated as:
Mark up percentage = (Selling price - Cost price)/Cost price * 100%
Substitute the known values in the above equation
Mark up percentage = ($20 - $4)/$4 * 100%
Evaluate the difference
Mark up percentage = $16/$4 * 100%
Evaluate the quotient
Mark up percentage = 4 * 100%
This gives
Mark up percentage = 400%
Hence, the mark up percentage of each order is 400%
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