$1.$

Jan $1$ Beginning Inventory $100$ units at $$10$

$5$ Purchased $200$ units @ $$13$

$10$ Sold $150$ units at $$40$

$15$ Purchased $300$ Units at $$15$

$20$ Sold $120$ units at $$50$

$25$ Purchased $90$ units @ $$18$

$30$ Purchased $50$ units at $$20$

$31$ Sold $203$ units $$60$

I$)$ Determine Ending inventory cost, cost of goods sold, gross profit using FIFO, LIFO, WEIGHTED AVERAGE COST METHOD Under:

i$)$ Periodic and

ii$)$ perpetual inventory systems