$($c$)$

Calculate $($i$)$ ending inventory, $($ii$)$ cost of goods sold, $($iii$)$ gross profit, and $($iv$)$ gross profit rate under each of the following methods:

LIFO, FIFO, and average cost. $($Round Gross profit rate to $2$ decimal places, e$.$g$.25\mathrm{.}22\%.)$