Use the Rule of 78 to determine the unearned interest on a loan with these conditions.
\begin{tabular}{|c|c|c|}
\hline \begin{tabular}{c}
Finance \\
Charge
\end{tabular} & \begin{tabular}{c}
Total Number \\
of Payments
\end{tabular} & \begin{tabular}{c}
Remaining Number \\
of Payments when \\
Paid in Full
\end{tabular} \\
\hline$\$ 860$ & 48 & 12 \\
\hline
\end{tabular}

The unearned interest is $\$ \square$.
(Round to the nearest cent as needed.)

Step 1 ：The Rule of 78 is a method used by some lenders to calculate the amount of interest a borrower must pay if they pay off their loan early. The rule is named after the sum of the digits 1 through 12 (the number of months in a year), which equals 78.

Step 2 ：The formula to calculate the unearned interest using the Rule of 78 is: Unearned Interest = \( \frac{{\text{{Remaining Payments}} \times (\text{{Remaining Payments}} + 1)}}{{\text{{Total Payments}} \times (\text{{Total Payments}} + 1)}} \) * Finance Charge

Step 3 ：In this case, the Finance Charge is $860, the Total Number of Payments is 48, and the Remaining Number of Payments when Paid in Full is 12.

Step 4 ：Let's plug these values into the formula and calculate the unearned interest.

Step 5 ：Unearned Interest = \( \frac{{12 \times (12 + 1)}}{{48 \times (48 + 1)}} \) * 860 = \$57.04

Step 6 ：Final Answer: The unearned interest is \(\boxed{\$57.04}\)