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Trey Monson starts a merchandising business on December $1$ and enters into the following three inventory purchases. Monson uses a perpetual inventory system. Also, on December $15,$ Monson sells $15$ units for $$20$ each.

$\backslash$table$[[$Purchases on December $7,10$ units $$6$ cost$],[$Purchases on December $14,20$ units e $$12$ cost$],[$Purchases on December $21,15$ units $$14$ cost$]]$

Determine the costs assigned to ending inventory when costs are assigned based on the LIFO method.

$\backslash$table$[[\frac{\text{P}\text{e}\text{r}\text{p}\text{e}\text{t}\text{u}\text{a}\text{l}\text{L}\text{I}\text{F}\text{O}\text{:}}{\text{C}\text{o}\text{s}\text{t}of\text{G}\text{o}\text{o}\text{d}\text{s}\text{S}\text{o}\text{l}\text{d}}$