Inventory economic reorder method doesn't recommend ordering enough to meet quantity available..

I'm struggling with how Sage 100 calculates the suggested reorder quantity when using the ECONOMIC reorder method on an item. It determines reorder is necessary based on quantity available but then only recommends ordering the amount in the Economic Qty field.

Example, a sales order for 100 makes the quantity available -100. To obtain the lowest price from the vendor, the item needs to be ordered in quantities of 30.  Putting 30 in the economic qty field produces a recommended PO for 30, which doesn't meet demand.  This is working as designed but doesn't make sense to me.  Is there anyone using an enhancement that would recommend ordering in multiples of 30, for this example?  I would love to see a recommended order amount of 120 here.