How much does this cost to the nearest dollar?

Upgraded Tiny Solar Charger BigBlue 14W SunPower Solar Panels with USB-A Max), IPX4 Waterproof, Portable Solar Phone Charger Compatible with iPhone X/8/7, Tablet, Samsung LG etc
Extremely Small Solar Charger Folding size is about 2.12in and weighes only 0.8lb, it is small than a notebook and you can put it in your backpack without adding a lot of weight. This 14W solar charger with amazing design is the most compact solar panel of BigBlue and suitable for camping, hiking, climbing or any outdoor activities. Higher Solar Conversion Highly efficient SunPower solar panel convert up to 24% of solar power into free energy. The USB port Max) with attached USB-C cable can power your cellphones, camping flashlight etc

Price is $40.00
Price: $39.99