1、How much you pay for your meals?

How much it cost your three/two for your meals?

2、I spend 300 yuan on my meals.

3、My clothea cost me 500 yuan.

4、I pay 300 yuan for this clothes/ these three clothes.

5、How much your clothes cost?

6、How much this clothes/ these two clothes cost?

其实cost、spend、pay三者的用法在一定程度上是互通的。