30% of $350.00 = $105
12*$24.50= $294.00
Josh will pay a total of ($105 + $294) =$399 for the bicycle.
$399.00 - $350.00 = $49.
Since the Bicycle is $350.00 we subtract that amount from his total payments ($399.00) and discover the difference of $49. So, his total finance charge is $49.
We can also break down the finance charge to 12 payments by dividing $49/12 = Josh pays $4.08 each payment (month) if these payments are monthly.
You can also deduct the $4.08 from the $24.50 and it will show his payments are $20.42 without finance charges.