加纳采购需求：机动三轮车、电动三轮车、电动滑板车、新能源汽车、零配件

I'm interested in importing 100 units of knock-down tricycles and would like to get a detailed breakdown of the costs involved. Specifically, please provide the price for the tricycles themselves, along with any additional fees related to shipping and customs. Additionally, I'd appreciate information on the assembly costs once the tricycles arrive. It would be helpful to understand any lead times you might have and if there are volume discounts available for larger orders in the future. Thank you!