Three Identical Units of Item Steele Plate Are Purchased During

Three identical units of Item Steele Plate are purchased during March, as shown below.
$\begin{array} { | l | l | l | l | } \hline & \text { Item Steele Plate } & \text { Units } & \text { Cost } \\\hline \text { Mar. } 3 & \text { Purchase } & 1 & \$ 830 \\\hline \text { Mar. } 10 & \text { Purchase } & 1 & 840 \\\hline \text { Mar. 19 } & \text { Purchase } & 1 & 880 \\\hline \text { Total } & & 3 & \$ 2,550 \\\hline\end{array}$ 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 (a) FIFO, (b) LIFO, and (c) average cost methods.