Keeping the assumptions about the U.S.-allied split in air defense and assuming more than 90 percent of munitions used after Day 5—“point of munitions transition”—to be low-cost weapons, Operation Epic Fury is estimated to have cost $16.5 billion by its twelfth day. This number includes the cost of operations—both budgeted and unbudgeted—and damages. War costs will increase by about half a billion dollars a day, unless one side significantly changes its activities or an outside event alters the war substantially.