Oriole Marine Products began the year with $10$ units of marine floats at a cost of $$14\mathrm{.}60$ each. During the year, it made the following purchases: May $5,30$ units at $$21\mathrm{.}40$; July $16,15$ units at $$26\mathrm{.}20$; and December $7,20$ units at $$32\mathrm{.}00.$ Assuming there are $25$ units on hand at the end of the period, determine the cost of goods sold under $($a$)$ FIFO, $($b$)$ LIFO, and $($c$)$ average$-$cost$.$ Oriole uses the periodic approach.

Cost of Goods Sold

FIFO

$

LIFO

$

Average$-$cost $