Answer:
$392.16 in interest saved
Explanation:
The payoff in 1 year costs a total of 12 × $366.72 = $4400.64.
The payoff in 2 years costs a total of 24 × $199.70 = $4792.80.
Paying off the balance in 1 year saves interest charges of ...
... 4792.80 -4400.64 = $392.16