Unit of Measure and Average Cost on a Saved Search

I have a saved search for inventory including the serial/lot numbers. I want to show the average cost and the quantity on hand. If I choose 'ON HAND' I get the total quantity in the primary stock unit. If I choose 'Inventory : On Hand', I get the quantity of that lot number in the base unit. This base unit doesn't align with the average cost. How can I get a saved search to align these properly, or is there a report I can use instead that will be accurate?

For example, I have 2 lots, ABC and XYZ. My primary stock unit is mg and the base unit is mcg. If the qty is 2mg for ABC and 2mg for XYZ, the 'inventory: on hand' will read 2000 and 2000 on each lot line. If I use 'On Hand', I get 4 on each lot line. If the price is a $1000 for 1 mg, then the average cost is showing $1000 on each lot line, which looks like the total value would be $1000 x $4000 when showing the 'inventory: on hand.' It's a mess….