| Lifo and fifo if you start with 50 units @ $20 for a total of 1000 and have a purchase of 200 @ $22 for a total of 4400 and then have sale of 90 @40 for a total of 3600 how do you get the inventory because wouldn't it be a negative 40 for a total of negative 1600 but it is saying it's wrong can you please help |