Cost of a comic book: $3.95 markup: 20%

Hi. I am assuming that you are asking the price of the comic book after the 20% mock-up. Is that correct?

If yes, you can simply change the percent to a decimal and then multiply it by the original price to see the price of the markup. Once you have that answer, you just add to the original cost.

Example: $3.95 x .20 =  $0.79

$3.95 + $0.79 = $4.74

I hope this helps.

Take care,
Diana