Marco's unpaid credit card is $4332.75.
his apr is 18.6%.
what is his new balance if he made one new transaction for $432?

First, add the new transaction made to the previous unpaid credit card value. The sum will be,
                                 $4764.75
Then, add the APR value by multiplying the amount above by 1.186. This will give us an answer of,
                                    $5651