Per a quick google, LiON batteries are somewhere in the vicinity of $100/kwh, which would put the large battery pack at around $23k just for the battery pack.
Given the inflation we've seen in Ram's pricing over the past few years, I'd expect to see at least a ~$20k upcharge over the equivalent ICE model for the standard battery pack and at least a ~$25-30k upcharge for the large battery pack, which easily gets you into the six figure club.
ETA: Throw in the EV motors, onboard charger, assorted electronics, and I'd hazard a guess that the EV powertrain, not counting the battery pack, doesn't cost all that much different than the ICE powertrain.