Based on the information provided, can you help me answer the following questions?

Craig wanted to know if it is okay to change from the FIFO method to a different method. He thinks net income could be lower using LIFO and he can save on his personal taxes. Is he correct? Do you think Craig should do this? Why or Why not? Include in your answer any accounting rules or principles that would apply.

Craig asked what measures of internal control should be implemented to protect the inventory. Discuss at least $4$ measures the company should implement. Also, explain to Craig why it is so important to maintain these good controls.