apiece

Etymology

From Middle English a pece, equivalent to a + piece.

adv

1. Each by itself; for or to each one
   These melons cost a dollar apiece.
   The engines were built in the Doncaster works at what I believe to have been the low cost, even for those days, of £2,500 apiece, …. 1943 January and February, Chas. S. Lake, “Some C.M.Es. I Have Known: IV—H. A. Ivatt”, in Railway Magazine, page 30