If you don't get an answer here quickly from someone who knows, then by all means call Dish. I've never had a problem getting explanations of what I'm being billed for. And in fact one such question had them find something ELSE on my bill that I should NOT have been paying for and they refunded all the way back to ..... some change in service... can't remember what caused the change.
It's your bill. You have a right to know what you're paying for and Dish has always been great about making sure I understand my bill.