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Three identical units of merchandise were purchased during March, as follows:$\newline$\begin{tabular}{rlcr} $\newline$& Steele Plate & Units & Cost \\$\newline$\hline Mar. $3$ & Purchase & $1$ & $\$ 830$ \\$\newline$$10$ & Purchase & $1$ & $840$ \\$\newline$$19$ & Purchase & $1$ & $880$ \\$\newline$\cline { $2$ - $3$ } & Total & $3$ & $\$ 2,550$ \\$\newline$\hline$\newline$\end{tabular}$\newline$Assume that one unit is sold on March $23$ for $\$ 1,125$. Determine the gross profit for March and ending inventory on March $31$ using the (a) FIFO, (b) LIFO, and (c) weighted average cost methods.$\newline$\begin{tabular}{lll} $\newline$& Gross Profit & Ending Inventory \\$\newline$\hline a. First-in, first-out (FIFO) & $\$ \square$ \\$\newline$b. Last-in, first-out (LIFO) & $\$ \square$ \\$\newline$c. Weighted average cost & $\$ \square$$\newline$\end{tabular}