How much does this cost to the nearest dollar?

Patio Umbrella Light Rechargeable Battery Operated Waterproof 28 LED for Outdoor Indoor Use
Convenient-No need for extra tools,easy to clamp to your umbrella with the built-in auto adjustable strong clamp,also can be hung anywhere using the two hooks,pole mounted,fit pole size from 0.86 inch to 1.81 inch in diameter. Dual Power Sources Umbrella pole light is built-in rechargeable batteries and the patio light can be charged easily by attaching to the USB port; Umbrella lights can also battery operated by 4 AA batteries (Not included),can be easily purchased anywhere. 3 Brightness- 3 modes for brightness Dim (Inter 8 LED bulbs), Bright (Outer 20 LED bulbs), Super Bright (All 28 LED bulbs) Charging

Price is $18.00

Price: $17.81