That's what I came up with but interest rate and volatility factor heavy in the the calculation. The rest of the numbers you input are pretty straight forward.

It also doesn't take into account supply and demand. Seems like there is less supply and more demand, but still overall low volume.

Bottom line is, warrants might be worth more to someone that understands the risk, but cannot borrow money at any cost. I think the current sp is undervalued which will catch up to the warrant price and they will move hand in hand.