How much does this cost to the nearest dollar?

Dicor DiFlex II 35' x 8' 6 TPO Rolled Roofing
Dicor DiFlex II RV roofing material is a non-fleece backed TPO membrane from Dicor, the RV Roofing Experts. Unlike standard TPO, DiFlex II is extremely flexible and is as subble as most EPDM. It easily conforms to most RV roofing surfaces for a snug, tight fit. DiFlex II is embossed with a light pebble pattern to dull harsh reflections and provide a classic look. This roofing system is compatible with all existing Dicor aftermarket cleaners, protectants, sealants, and bonding adhesives. Features Highly flexible; UV resistant through lifetime; Hail resistant. 35 Feet x 8 Feet-6 inch, Dove (Bright

Price is $519.00
Price: $518.96