#Tom Morgan
#Thomas Jefferson HS for Science and Tech
#Python
#ACSL Post Office

from string import *

mail = [lambda a,b,c:((a>= 3.500)&(a<= 4.250))&((b>= 3.500)&(b<= 6.000))&((c>=.007)&(c<=.016)),
        lambda a,b,c:((a>  4.250)&(a<  6.000))&((b>  6.000)&(b< 11.500))&((c>=.007)&(c<=.016)),
        lambda a,b,c:((a>= 3.500)&(a<= 6.125))&((b>= 5.000)&(b<=11.500))&((c> .016)&(c< .260)),
        lambda a,b,c:((a>  6.125)&(a< 24.000))&((b>=11.000)&(b<=18.000))&((c>=.250)&(c<=.500)),
        lambda a,b,c:((a>=24.0)|(b>18.0)|(c>.5))&(a+2*(b+c)<=84.0),
        lambda a,b,c:(a+2*(b+c)>84.0)&(a+2*(b+c)<=130.0)]
zone = (7000, 20000, 36000, 63000, 85000)
cost = ((.2,.03),(.37,.03),(.37,.04),(.6,.05),(2.95,.25),(3.95,.35))

def kind (d):
    return (map(lambda x:mail.index(x), filter(lambda x:x(d[0],d[1],d[2]),mail))+[-1])[0]

def zones (z):
    return len(filter(lambda x:(min(z)<x)&(max(z)>=x),zone))

for i in range(5):
    info = map(float,split(raw_input()))
    k = kind(info[:3])
    if k == -1:
        print "UNMAILABLE"
    else:
        v = str(round((cost[k][0]+cost[k][1]*zones(info[3:]))*100)/100)
        v += ("0","")[len(str(v))-str(v).index(".")-2]
        print (v,v[1:])[v[0]=='0']