Problem 5-2A: Alternative cost flows—perpetual L.O. P1

Marlow Company uses a perpetual inventory system. It entered into the following calendar-year 2009 purchases and sales transactions:

It then gives me a list of purchases and sales.

How do I know if this is FIFO, LIFO, or weighted average? Does perpetual L.O. mean LIFO or is that just a label for the question?