Take it up with your boss.

和老板说说看。

A: We are always being asked to work late.

总是让我们加夜班。

B: I know. Take it up with your boss.

我知道，和你们老板说说看。

It's for a good cause.

这是善举。

A: Are you saying you want me to donate money?

你是说你想让我捐款?

B: It's for a good cause. It will help poor children.

这是善举，可以帮助困难儿童。