Answer:

PER

AnswerCrossword Clue
PER.... diem
PERA pop
PERApiece
PEREach
PERFor each
PERWord before diem or annum
PER.. annum
PER.. capita
PERAccording to
PEROne ... customer
PERUp end?
PERFor every
PERPay-...-view
PERPart of wpm
PER.. diem
PERMPH middle
PERIn accordance with
PERWord before a unit
PERThe p of rpm
PERIndividually
PERPricing word
PERR.p.m.'s p.
PERRPM part
PERUnit-price follower
PER... annum
PERBy means of
PERContra or capita preceder
PERIn keeping with
PERPart of mph
PERUnit-cost word
PERWord before diem or capita
PEROn the authority of
PERPart of rpm
PERPay-..-view
PERWords .. minute
PERAllocation word
PER... diem (daily)
PERWhat "p" often means
PER.. se
PERMPG part