{HEAD ~ Productivity} increases of {TAIL ~ 15 percent} and often more can be achieved at relatively low expense 
increases of
{ HEAD ~ Productivity } increases of { TAIL ~ 15 percent } and often more can be achieved at relatively low expense
HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH