##Lua, 165 Bytes

l={}i=1while(l[i-1]~="")do l[i]=io.read()o=l[i]:find"%*"x=o or x y=o and i or y i=i+1 end print(#l[i-2]:sub(1,x):gsub("%S+%s*","#")*100+(i-y-1)*10+#l[y]:match"#-%*")

Ungolfed

l={}
i=1
while(l[i-1]~="")do
    l[i]=io.read()
    o=l[i]:find"%*" --find "*", and record:
    x=o or x        --position and
    y=o and i or y  --current floor
    i=i+1
end
print(#l[i-2]:sub(1,x):gsub("%S+%s*","#")*100 --[[Take last string of list, and then
                                                  take the substring up until the 
                                                  asterisk. Substitute any substrings
                                                  that include nonspace characters 
                                                  (%S+) followed by a minimum of 0 space 
                                                  characters (%s*) with one character
                                                  (in this code snippet I chose # for no 
                                                  particular reason.) Then take the length 
                                                  of this string, with the # operator. 
                                                  The %S+%s* regex and gsub do the bulk 
                                                  of the magic.
                                                ]]
      +(i-y-1)*10                             --[[Total number of lines minus '*' floor 
                                                  minus one.
                                                ]]
      +#l[y]:match"#-%*")                     --[[Find the substring on the asterisk floor
                                                  with '#' symbols preceding an asterisk.
                                                ]]