the dictionary costs me 30 yuan为什么用costs呢

the dictionary costs me 30 yuan为什么用costs呢 It costs me 100 yuan. the shoes costs me 100 yuan.sth costs sb some money,这个固定的句型里 the computer costs me 10000 yuan.it's so d____ the computer costs me 3,000 yuan的同义句 The new electronic calculator costs me 200 yuan 同义句 then coat costs me 100 yuan The book cost him 10 yuan可不可以用costs The coat costs 20 yuan同义句 the coat cost me 5 yuan.这是用cost还是用costs好?有没有判断的标准啊 the coat costs 300 yuan the coat_______ _______ 300 yuan This shirt costs me thirty yuan.That shirt costs me twenty y