“of” or “for”?

涂于德

price of
▬ The price of fuel keeps going up .
price for
▬ We agreed on a price for the bike.

After “price”, which word should be used, “of” or “for”?

yzh_nj_china

好像都可以的样子~~
a price of xx 是个名词
a price for xx 好像不行，应该是the price for~~the price 名词 for xx ~~