result =""
sqft =0

$tree["rooms"].keys.each_with_index do |key,index|
s= (index+1).to_s
if ($tree["rooms"][key]['floor_number'] == 1)
result += " " + s +"\t" + $tree["rooms"][key]['room_name'].to_s + " \t" + $tree["rooms"][key]['floor_number'].to_s + " \t" + $tree["rooms"][key]['internal_area'].round(0).to_s + " sq ft\n"
sqft +=$tree["rooms"][key]['internal_area'].round(0)
end
end

result += "Totals: \t\t\t" +sqft.to_s + " sq ft \n"
result