Is there any way we could make the combined resource cacheble at browser level

[pkpuppala]

First let me thanks for this fantastic software !!

My doubt is is there a way we could make the combine file remembered at browsers cache.. as any .css file or .js file will return HTTP code 304 (as no changes and loads from cache), it would improve the site loading time and performance.

But when we combine all resources it always return with HTTP 200 code that means every time page load the combine resources loads fresh copy..

Thanks,