LIFO/FIFO Method, assignment help

The controller of Sagehen Enterprises believes that the company should switch from the LIFO method to the FIFO method.  The controller’s bonus is based on the next income.  It is the controller’s belief that the switch in inventory methods would increase the net income of the company.  What are the differences between the LIFO and FIFO methods? 

Must reference text used cited from chapter 5 attached document

Reference

K Wainwright, S. (Ed.). (2012). Principles of Accounting: Volume I . San Diego, CA: Bridgepoint Education, Inc.

05ch_accounting_volumei.pdf