How much does this cost to the nearest dollar?

Ebtech Hum X Ground Line Voltage Filter,Black
Filters noise and excess current on ground line that can cause hum and buzz in audio or video. Use only on equipment with current draw less than 6 amps (720 watts) Use only on equipment with current draw of 6 amps (720 watts) or less. Not designed for 60Hz hum caused by close proximity to other equipment or cable problems. Not a ground lift - maintains equipment ground Suitable for use on 120V 60Hz grounded USA-style power outlets Use 1 Hum X per piece of gear. Multiple hum issues may require more than one Hum X. Not designed to get rid of cable related or guitar pickup related hum. NOTE Check Instructional Video and User Manual before use Weight 1.44 ounces, Dimensions 4

Price is $79.00
Price: $79