PLEASE HELP; solve both; fill in the tables for Cost of Goods Available for Sale and Number of units in ending inventory for FIFO & LIFO. PLEASE:

Alta Ski Company's inventory records contained the following information regarding its latest ski model. The company uses a periodic inventory system.

Beginning inventory, January $1,2024$

Purchases:

January $15$

January $21$

Sales:

January $5$

January $22$

January $29$

Ending inventory, January $31,2024$

$950$ units @ $$60$ each

$2,000$ units @ $$75$ each

$1,800$ units @ $$80$ each

$900$ units @ $$100$ each

$1,300$ units @ $$110$ each

$750$ units @ $$115$ each

$1,800$ units