How much does this cost to the nearest dollar?

WATTS 1/4 to 1/2 inch 909 AGA Air Gap
This air gap for reduced pressure zone assembly, 1/2 IN series 009, 3/4 IN series 009M2 and 009M3, and 1/2-1 IN series 995, provides an unobstructed, physical separation between the discharge end of a potable water supply line and an open receiving vessel. The installation of an air gap and drain line are recommended on reduced pressure zone assemblies. It can be installed vertically or horizontally (vent elbow required for vertical installation). Brand Name Watts Product Dimension 1 X 1 X 1 Country Of Origin United States Model Number 881399 Manufacturer Watts, Part Weight 14.4 ounces, Dimensions 

Price is $58.00

Price: $57.53