6. (i) The following table presents the readings from an electricity meter with a 15-ampere capacity:
[Use the Service and Energy Charge of NEA from the given tariff rate.]

\begin{tabular}{|c|c|c|c|}
\hline [tex]$1^{\text{st}}$[/tex] Asoj & [tex]$1^{\text{st}}$[/tex] Kartik & [tex]$1^{\text{st}}$[/tex] Mangsir & [tex]$1^{\text{st}}$[/tex] Paush \\
\hline 2145 & 2352 & 2560 & 2845 \\
\hline
\end{tabular}

(a) Determine the service charge due for 325 units of electricity usage.

(b) Calculate the electricity consumption for the months of Asoj, Kartik, and Mangsir separately.

(c) Calculate the electricity bill for the month of Asoj.

(d) Ascertain the percentage difference in electricity usage between the highest and lowest consumption months among Asoj, Kartik, and Mangsir.

\begin{tabular}{|c|c|c|}
\hline \multirow[b]{2}{*}{\begin{tabular}{l}
KW/hr \\
(Unit)
\end{tabular}} & \multicolumn{2}{|c|}{15 Ampere} \\
\hline & \begin{tabular}{l}
Service \\
Charge
\end{tabular} & \begin{tabular}{l}
Energy \\
Charge
\end{tabular} \\
\hline [tex]$0-20$[/tex] & 50 & 4.00 \\
\hline [tex]$21-30$[/tex] & 75 & 6.50 \\
\hline [tex]$31-50$[/tex] & 75 & 8.00 \\
\hline [tex]$51-100$[/tex] & 100 & 9.50 \\
\hline [tex]$101-250$[/tex] & 125 & 9.50 \\
\hline Above 250 & 175 & 11.00 \\
\hline
\end{tabular}