I need to know how to do this! Teacher won't help, book is useless. Please?

Howland preparing Comparative Condensed Income statement using FIFO & LIFO.

Inventory
-Beginning (10,000 Units) $22,500
-Ending (20,000 units)

Purchases
-Total Net sales (220,000 units) $862,000
-Total Cost of goods Purchased (230,000 units) 567,500

Quarter--Units---Unit Cost---Total Cost--
1----------60,000----2.30------138,000
2---------50,000-----2.40------120,000
3--------50,000------2.55------127,500
4-------70,000------2.60-------182,000
_________________________________
------230,000-----------------567,500