"Price" is the word in Engpsh for the cost or amount of money that something is sold for. "Free" means without cost or charge.
Here are some example sentences using these words:
"The price of this item is $10." (这件物品的价格是10美元。)
"This service is free for all customers." (这项服务对所有客户都是免费的。)
"I can't afford to pay the full price for this." (我没有足够的钱支付这个的全价。)
"Is there a discount if I buy in bulk?" (如果我批量购买会有折扣吗？)
The words "price" and "free" are commonly used in Engpsh to describe the cost or lack of cost for goods and services. They are derived from the Old Engpsh "pris" and the Old French "fre" respectively.