This is the most specific of this: 1mb = 1024kb = 1,048,576bytes.
Though, you could just say 1000 instead of 1024. Either way, SAMP does not take kilobytes persecond if I recall, it takes bytes per second. Last time I recall, it was like 300btes persecond, so ((60*300)*60) = 1,080,000 / 1024 = 1,054 which is basically 1 megabyte perhour. Give or take..