Hello,
I realize this is a very old thread, but it is still very relevant. I have an inventory item where QB calculated the rate to the third digit, but for the FIFO cost, it was rounded to only two. This means when the inventory quantity is zero, the inventory value is a negative .04 cents. I need help to clear this negative, but there is no way to change the rate or FIFO cost. Plus, the beginning inventory is from many years ago, so I'm unable to make an adjustment there as well.

I'll try to paste from the inventory valuation detail report:
Rate FIFO Cost
12 15.425 185.100
-1 15.425 (15.430)
-1 15.425 (15.430)
-3 15.425 (46.280)
-1 15.425 (15.430)
-1 15.425 (15.430)
-1 15.425 (15.430)
-1 15.425 (15.430)
-3 15.425 (46.280)
0               (0.040)

I have this situation on three other items that we no longer carry, and showing negative values on the inventory report for the years to come is not ideal. I hope you can help!