calculating {TAIL ~ a utilization} for {HEAD ~ the selected product} based on product properties specified by the user 
calculating { TAIL ~ a utilization } for { HEAD ~ the selected product } based on product properties specified by the user
OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH