Assuming {TAIL ~ power costs} are at {HEAD ~ $50.00/MW}, then the fourth linguistic values are  
Assuming { TAIL ~ power costs } are at { HEAD ~ $ 50.00 / MW } , then the fourth linguistic values are
OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH