price, fee, cost, fair 有咩分別??

What is the price for this book ? price is for object more.
What is the transaction fee for buying stock ? fee is for service and event.
How much does it cost ? What is the cost for this project ?
cost is for both object and service and even, and process, more general.
fare is for short term service, temporary, shorter period.
For example, Bus fare, ferry fare...
It is more a usage and application difference, and habbits too.

price 價格,價錢 e.g. 商品/貨物價錢
fee 費(如學費,會費,入場費等) e.g. doctor's fare 醫生費
cost 成本 e.g. production cost 生產成本
fare (交通工具的)票價,車(船)費 e.g. bus fare