Lopez Company reported the following current$-$year data for its only product. The company uses a periodic inventory system, and its ending inventory consists of $150$ units$50$ from each of the last three purchases.

January $1$ Beginning inventory $96$ units @ $$2\mathrm{.}00=$ $ $192$

March $7$ Purchase $220$ units @ $$2\mathrm{.}25=495$

July $28$ Purchase $544$ units @ $$2\mathrm{.}50=1,360$

October $3$ Purchase $480$ units @ $$2\mathrm{.}80=1,344$

December $19$ Purchase $160$ units @ $$2\mathrm{.}90=464$

Totals $1,500$ units $ $3,855$

$($a$-$d$)$ Determine the cost assigned to ending inventory and to cost of goods sold for the following.

$($e$)$ Which method yields the highest net income?