8dd8e1b3_O_Accounting___AccountingTools__LIFO_Method
[Issue] Record keeping [FIFO Method] There are usually fewer inventory layers to track in a FIFO system, since the oldest layers are continually used up. This reduces record keeping. [LIFO Method] 
There are usually more inventory layers to track in a LIFO system, since the oldest layers can potentially remain in the system for years. This increases record keeping.
FIFO vs LIFO Accounting - AccountingTools
LIFO Method