This is really good conversation.
My understanding of inventory management has three categories of possible adjustments. Trina calls one of them as inventory effects. This is basically loss of value due to market conditions. A company evaluates value of inventory (used and not used) at lower cost and the market. This will be taken out in COGS and value of inventory will change in the BS. In this case company will price inventory to the lower cost and will take the write-down or adjustment or inventory effect.
Second one is simply write off of obsolete, not salable product. One has to be careful to differentiate between the two , as companies generally do not report adjustments but mostly write-offs. This is why gross margin on processing does not look the same as gross margin on cogs.
Last one is the cost of carrying inventory which appears in cogs, like storage costs, etc. which would also add up.
0.53 excludes non-cash charges, but payroll or labor is part of processing, so it is a cash-charge, I would argue that they had not laid off everyone to drop to 60 or 80% they were operating at. They also paid bills for utilities etc, storing of inventory and so on, so even if I am 50% wrong there is still a penny or two to squeeze. I think that materials will go up in Q1, and therefore we will have a paradox.Anything which was adjusted down in q4 will have a higher price in Q1. Materials are going up pushing ASP. Technically they can increase gross margins by this.
I should add that inventory cost for finished goods is the all-in- processing cost. Only when that cost is below the market, the realized value becomes associated with prevailing market price. This is why in so many cases losses have been overstated due to inventory dropping like a stone.