Answer: customer is incorrect
Step-by-step explanation:
I am working this from b first
b $800 x .20 (20%) = $160 discount
$800 - $160 = $640 customers price
the price of the computer after the 20% discount would be $640
a customer thinks seller is going to break even this is not true
$640 (customer cost after discount) x .20 (20% discount) =$ 128
$640 + $128 = $768
Cost of the laptop before the 20% markup is $667.67
$666.67 x .20 = $133.33
$666.67 + $133.33 = $800
$768 ≠ $667.67