The issue with just buying more molds is that you need people to work the molds. If Stocky's only jas the manpower to run 3 molds for more than a few days at a time, then buying more is pointless.
Investing in molds may not be the issue.
Three molds can make 385 stocks in 90 days. I don't think UM has been able to get half that many out the door in over 6 months.
If we consider mid March to be production start to eliminate consideration of things like grip panels, they are still moving less than the capacity they have in molds. Buying another mold would be pointless.
Also, how many stocks did they sell? If 400, than I would consider 3 molds as being pretty close to what was promised. If 500, then 4 molds. However, as pointed out earlier, a fourth mold is unlikely to change anything.
Why I say 3 molds:
It was stated each mold makes 2 stocks per day and I assume Stocky's does not operate on weekends.
So, at 30 per week:
(30/2)/5=3
And check
3x2x5=30