From the Invoice, Extend Each Line to the Total Column

From the invoice, extend each line to the total column and calculate the invoice subtotal and total: $\begin{array}{|l|l|l|l|l|l}\text { Stock \# } & \text { Quantity } & \text { Unit } & \text { Merchandise } & \text { Unit Price } & \text { Total } \\\hline & & & \text { Description } & & \\\hline 2839 & 28 & \text { ea } & \text { Staplers } & \$ 9.20 & \$ \\\hline 1612 & 15 & \text { ea } & \text { 2-tier trays } & 3.19 & \\\hline 3218 & 2 & \text { gro } & \# 2 \text { pencils } & 21.60 & \\\hline 3318 & 8 & \text { bx } & 3 x 5 \text { index cards } & 5.26 & \\\hline & & & \text { Invoice Subtotal } & & \\\hline & & & \text { Shipping Charges } & 51.98 \\\hline & & & \text { Invoice Total}&\$\\\hline\end{array}$