If one were to ask a group of randomly selected individuals to define "price",many would reply that price is an amount o

If one were to ask a group of randomly selected individuals to define "price",many would reply that price is an amount of money paid by the buyer to the seller of a product or service or,in other words,that price is the money value of a product or service as agreed upon in a market transaction.
其中“by the buyer to the seller of a product or service or”最后一个“or”是什么意思,有没有语法解释?