show me how did you found remaining units et remaining cost question $1$

Inventory information for $311$ of Monique Aaron Corp. discloses the following information for June:

Purchases

June $1$ Balance $300$ units @$$10$

Sales

$11$ Purchased$800$untis@$$12$

June $10$ Sold $200$ units@$$24$

$20$ Purchased $500$ units@$$13$

$15$ sold $500$units@$$25$

$23$ sold $400$ units @$$26$

$22$ Purchased $700$ units@$$14$

$27$ sold $300$ units@$$27$

$28$ purchased $250$ units@$$15$

Instructions

a$)$ Assuming that perpetual methods are used, Complete the cost of goods sold and ending inventory under

LIFO

FIFO

Average cost

b$)$ Which inventory method, FIFO, LIFO, or average cost will show the highest net income?