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