Yup - no problem. I do it all the time. Beware of falling into the "near enough" trap that I did some years ago though. Personally, I find film development akin to watching grass grow and I did one combined run where two film times differed by two minutes. I, of course, split the difference and spent more time and money on printing and materials, (not to mention the mental health effects!) than I'd saved on the film development. A cautionary tale..........