The s, was that for sling or superJoey? If the SJ, then it is $10 additional to the given price. If just the 2 TVs, then sounds right. Also, check their website for operating fees. These are fees charged in states they charge more to operate in. Tx is one, and I believe Washington is as well.
This page does not list all the state taxes and fees. In Washington State, I'm paying what Dish calls a "state/local tax (Sales)" of 1.8% on my bill which appears to be a tax on the Hopper rental. No mention of this tax on the link above.