Awning Window Cost Estimator
Awning windows are hinged at the top and open at the bottom. They are essentially a casement window that is rotated 90 degrees. In terms of cost, they will run more than a simple horizontal slider or single hung window. They are typically on par with double hungs and casements - about in the middle of the pack in terms of cost.
The real cost considerations are going to be who you buy the window from, the number of upgrades you select and the sort of installation that you need (which is going to be determined by the overall condition of your frames and sills.)
Awning Windows Cost Calculator
Egress Windows Cost Calculator