Ok. I'll bite.
Hybrid batteries are good for about 100,000 miles. Your driver would make a little over 33.3 trips saving $200 each time (more savings as average gas prices rise). So that's $6,667 saved in fuel.
Now pay the piper. The Prius battery pack is around $1,000 (plus a few thousand installed). You can absolutely bet a hybrid consumer truck battery is at least twice that size, so it's $2,000 (plus a few thousand installed). I'll be generous and say the battery installation is $1,000. So, after you've driven 100,000 miles, you now have to pay $3,000 to replace your battery pack.
Your net savings at 100K miles is around $3,667 (fuel - batt pack). Now what was the price premium you paid for the hybrid truck over a conventional truck? Oh, $3,000. Did you finance that money? You probably did, in which case you paid interest on it to your bank.
At 100K miles, that hybrid truck will cost you MORE than a conventional truck at current gas prices.
Buy a diesel and get 16MPG vs gas @ 10 or hybrid @ 12.
Oh, and if you're talking big rigs, hybrid is a joke. Big rig diesel engines go 300,000 miles before major service because they're big, low-revving engines.
Don't believe the hybrid hype.