How much does this cost to the nearest dollar?

Casper Custom-Cut Retractable Single Door Screen (White)
The Casper DIY self-install single retractable screen door is designed to be used with both in-swing and out-swing doors. Casper retractable screens can be used for Single Doors, Patio Doors, Front Entry Doors and other single door applications. Our doors are mounted inside the framework of the doorway to maintain the beauty and look of your existing doors. At Casper Screens we have harnessed the use of natural ventilation to help cool your home by allowing for the maximum amount of fresh air to enter the home while simultaneously removing the stagnant, warm air. Casper retractable screen doors retract and contract in a smooth, fluid motion with our smart and functional design. When not in use, Casper Screen doors retract back

Price is $319.00
Price: $319