It is sometimes very difficult to hatch out shipped eggs. Typically, with a fresh egg, you can store it for a short time in a refrigerator, not too cold.... I think around 70 degrees... (don't quote me on that)... but the longer you try that, the less likely you will get them to hatch later. You are counting your shipped egg chickens before they hatch. I think if it were me, I would incubate them all and hope to get a few to hatch. If you wind up with a dozen chicks, that would be a nice surprise, but it happens. But no, I would not expect any saved/shipped eggs to last any meaningful length of time in a refrigerator without a considerably more sophisticated set up than I suspect you possess.