How many different inventory pricing methods is the contractor allowed to use on different contracts and which inventory pricing methods are approved for use? Up to two different inventory pricing methods may be used. The approved methods are: first-in, first-out; last-in, first-out (LIFO); weighted average; moving average; and standard cost. Only one inventory pricing method may be used. The approved methods are: first-in, first-out (FIFO); last-in, first-out (LIFO); weighted average; moving average; and standard cost. Only one inventory pricing method may be used. The approved methods are last-in, last out (LILO); first-in, last out (FILO); weighted average; moving average; and standard cost. Up to two different inventory pricing methods may be used. The approved methods are last-in, last-out (LILO); first-in, last out (FILO); weighted average; moving average; and standard cost