Waterway Company's record of trIf the perpetual inventory record is kept in dollars, and costs are computed at the time of each withdrawal, what amount would be shown as ending inventory under $(1)$ FIFO, $(2)$ LIFO and $(3)$ Average$-$cost$?($Round average cost per unit to $4$ decimal places, e$.$g$.$

$2\mathrm{.}7621$ and final answers to $0$ decimal places, e$.$g$.6,548.)$