The fan will cost an additional 8 yuan if it is replaced with an external adapter, and an additional 23 yuan if an external adapter is provided. If an internal adapter is provided, it will cost an additional 20 yuan per unit. For a remote control fan, it will cost an additional 25 yuan per unit, and for a solar panel, it will cost an additional 7 yuan per watt. For a solar panel power cord, it will cost an additional 2 yuan per meter. The fan with LED light board will cost an additional 8 yuan per unit, and colored packaging will cost an additional 2 yuan per unit. Adding outer packaging will cost an additional 2 yuan per unit. Note! This quote is for the current day's price, and all prices are subject to the unit price discussed on the day of the order confirmation.