r each $325 order at his cost of 55% off retail, Doug is entitled to $178.75. If we subtract 1% of the full retail price (1% of $325 = $3.25) for the Yahoo Store transaction fee and 2.5% for the credit card processing fee (2.5% of $325 = $8.13), Doug is left with a pretax profit of $167.38 for this one sale.