The cost of the bike James wants to buy including tax would be:
$85.00 + 8%($85.00) = $85.00 + $6.80 = $91.80
The total amount James needs to save is:
$91.80 - $35.25 = $56.55
So he needs to save about $56.55 more.
However, none of the given answer choices match this exact amount, so the closest option would be A. $55.